2015-05-23T01:09:07Zhttp://open-archive.highwire.org/handler
oai:open-archive.highwire.org:publius:38/2/1672015-05-20HighWireOUPpublius:38:2
Federalism and Interpretation
Rubin, Edward L.
Feeley, Malcolm M.
Articles
We offer a theoretical approach to federalism by defining a theoretical approach as a general account of the subject. It is general in that it applies in any political situation, at any time in history when political entities that are recognizable as nations existed. It is an account in being a systematic examination of the subject that is connected to the overall structure of analysis in one or more academic disciplines, in this case law and political science. Following this approach, we reach the conclusion that federalism must be understood as a matter of political identity. People's individual commitments in the political realm, their sense of who they are and where they belong, will determine the descriptive reality and the prescriptive necessity of federal arrangements.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/167
http://dx.doi.org/10.1093/publius/pjn004
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/1922015-05-20HighWireOUPpublius:38:2
Responses to Rubin and Feeley
Beer, Samuel H.
Bednar, Jenna
Smith, Troy
Strachan, J. Cherie
Articles
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/192
http://dx.doi.org/10.1093/publius/pjn005
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/2112015-05-20HighWireOUPpublius:38:2
Political Power, Fiscal Crises, and Decentralization in Latin America: Federal Countries in Comparative Perspective (and some Contrasts with Unitary Cases)
González, Lucas I.
Articles
What factors shape decentralization processes in Latin American federations? This work reviews and statistically analyzes current approaches on the topic, questions some claims of generality in their theoretical frameworks, and presents an argument to explain variation in decentralization processes across these federations. The main hypothesis is that the degree of decentralization (in fiscal and administrative terms) in Latin American federations has been shaped by the political power of the national executive and sub-national actors and the fiscal context in which they interact. The article presents statistical evidence (for federal and unitary countries between 1979 and 1998) to sustain some of the expectations in the argument and discusses some of its limitations.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/211
http://dx.doi.org/10.1093/publius/pjn001
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/2482015-05-20HighWireOUPpublius:38:2
A Critical Survey of Subnational Autonomy in African States
Fessha, Yonatan
Kirkby, Coel
Articles
This article examines the quiet yet pervasive transfer of power from central governments to subnational units in Africa since the early 1990s. Central governments have justified this trend by arguing it promotes one or more of three goods: democracy, development, and accommodating diversity. The authors survey six selected countries representing federal-unitary and regional differences to evaluate their degree of formal and substantive political, administrative, and financial autonomy. Transfer of powers to subnational units, the authors conclude, is a real and nearly universal trend. However, many central governments have clawed back this grant of power in numerous ways, which led to an informal recentralization of power. Moreover, central governments of federations have deliberately strengthened local government at the expense of regional autonomy.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/248
http://dx.doi.org/10.1093/publius/pjm040
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/2722015-05-20HighWireOUPpublius:38:2
Decentralization and Fiscal Discipline in Sub-national Governments: Evidence from the Swiss Federal System
Freitag, Markus
Vatter, Adrian
Articles
This article analyses the relationship between decentralization and the extent of fiscal discipline in the Swiss cantons between 1984 and 2000. From a theoretical point of view, decentralization and federalism can be associated with both an expansive and a dampening effect on government debt. On the one hand, decentralized structures have been argued to lead to a reduction of debt due to inherent competition between the member states and the multitude of veto positions which restrict public intervention. On the other hand, decentralization has been claimed to contribute to an increase of public debt as it involves expensive functional and organizational duplications as well as cost-intensive, often debt-financed, compromise solutions between a large number of actors that operate in an uncoordinated and contradictory way. Our empirical results show that in periods of prosperous economic development, the architecture of state structure has no impact on debt. However, the degree of decentralization influences debt in economically poor times: In phases of economic recession, administratively decentralized cantons implement a more economical budgetary policy than centralized Swiss member states.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/272
http://dx.doi.org/10.1093/publius/pjm038
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/2952015-05-20HighWireOUPpublius:38:2
National Election Cycles and the Intermittent Political Safeguards of Federalism
Nicholson-Crotty, Sean
Articles
Scholars have challenged the notion of “political safeguards of federalism” in a large and well-developed body of work on the use of coercive policy tools by the federal government. This study suggests, however, that there may be some utility in re-examining the political factors that help to constrain the growth of national power. Specifically, it argues that the need to win votes from subnational constituencies makes national lawmakers less supportive of mandates, preemptions, and tax sanctions during election cycles and, thus, provides an intermittent safeguard of state authority. It tests and finds evidence for hypotheses related to that general argument in analyses of the passage of coercive federalist policies over the last thirty years.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/295
http://dx.doi.org/10.1093/publius/pjn002
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/3152015-05-20HighWireOUPpublius:38:2
Federal Administrative and Judicial Oversight of Medicaid: Policy Legacies and Tandem Institutions under the Boren Amendment
Miller, Edward Alan
Articles
Because of the active role assumed by the courts in Medicaid nursing facility reimbursement, and because that role changed over time, federal intervention in this area provides a useful window through which to examine the role of the federal judiciary in oversight of state health policy making. Findings support the proposition that because judicial influence extends beyond program outcomes to include the organizational structure and beliefs of key stakeholder groups, the effects of case decisions, and the statutes under which they are litigation, may be deeper and longer lasting than their usefulness as a litigation tool. Findings also support the proposition that neither the executive nor the judiciary acts in isolation but instead they serve as tandem institutions guiding federal oversight of state policy making. Data for this analysis derive from archival documents, secondary sources, and 101 in-depth interviews.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/315
http://dx.doi.org/10.1093/publius/pjm035
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/3432015-05-20HighWireOUPpublius:38:2
To Treaty or Not to Treaty? Aboriginal Peoples and Comprehensive Land Claims Negotiations in Canada
Alcantara, Christopher
Articles
Although the federal comprehensive land claims (CLC) process has become an almost hegemonic paradigm of government–Aboriginal relations in Canada, this article argues that Aboriginal groups should consider abandoning the CLC process if they have not been able to make significant progress towards completing treaties. Previously, many Aboriginal groups had no better option but to negotiate CLC treaties to achieve their goals. Now, however, a number of institutional developments have given Aboriginal groups a range of other options that are worth pursuing instead of CLC treaties. These developments are: Two judicial decisions handed down in 2004 and the emergence of three policy instruments outside of the treaty process: Self-government agreements, bilateral agreements, and the <it>First Nations Land Management Act</it>.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/343
http://dx.doi.org/10.1093/publius/pjm036
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/3702015-05-20HighWireOUPpublius:38:2
Nationalism and Self-Government: The Politics of Autonomy in Scotland and Catalonia, by Scott L. Greer.
Zimmerman, Joseph F.
Book Reviews
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/370
http://dx.doi.org/10.1093/publius/pjm021
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/3722015-05-20HighWireOUPpublius:38:2
Courts and Federalism: Judicial Doctrine in the United States, Australia, and Canada, by Gerald Baier
Feeley, Malcolm M.
Book Reviews
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/372
http://dx.doi.org/10.1093/publius/pjm022
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/2/3752015-05-20HighWireOUPpublius:38:2
Work over Welfare: The Inside Story of the 1996 Welfare Reform Law, by Ron Haskins.
Allard, Scott W.
Book Reviews
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/2/375
http://dx.doi.org/10.1093/publius/pjm023
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/12015-05-20HighWireOUPpublius:38:1
Political Economy of Grant Allocations: The Case of Federal Highway Demonstration Grants
Gamkhar, Shama
Ali, Hamid
Articles
This article examines the political economy of U.S. federal highway demonstration grant allocations. Demonstration grants are a rapidly growing segment of federal highway grants directly earmarked for a congressional district by Congress, unlike the majority of highway grants where Congress determines a formula and allocates funds accordingly to states. Our empirical analysis, considering the period 1983–2003, suggests that a state's ability to attract demonstration project grants is positively influenced by its contributions to the highway trust fund and political variables, and it is not affected by the formula highway aid and vehicle miles traveled in a state.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
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http://publius.oxfordjournals.org/cgi/content/short/38/1/1
http://dx.doi.org/10.1093/publius/pjm028
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/1112015-05-20HighWireOUPpublius:38:1
Work Sharing Policy: Power Sharing and Stalemate in American Federalism
Balducchi, David E.
Wandner, Stephen A.
Articles
Work sharing benefits are partial unemployment benefits, and federal policy related to them is in an administrative muddle. A lack of leadership by the federal government has stalled state implementation. During economic downturns when political voltage is high, policy makers look to work sharing as one way to manage job loss. Conversely, work sharing is often forgotten during prosperous times. This article describes how federalism sometimes facilitates state initiation of work sharing policy and at other times impedes it. The authors discuss work sharing through six policy phases during a thirty-year era of devolving federal authority to states for employment services and job training, and they make observations about the stalemate in federal policy.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
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http://publius.oxfordjournals.org/cgi/content/short/38/1/111
http://dx.doi.org/10.1093/publius/pjm030
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/1372015-05-20HighWireOUPpublius:38:1
Congressional Intrusion to Specify State Voting Dates for National Offices
Stonecash, Jeffrey M.
Boscarino, Jessica E.
Kersh, Rogan T.
Research Note
Through the nation's first century, states used their concurrent constitutional right to schedule presidential and House elections at widely varying times. Senators were also elected within the states at diverse times. This study examines the gradual establishment of uniform election dates and offers an explanation of why Congress felt it appropriate to override state autonomy to eventually establish uniformity of state practices.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/1/137
http://dx.doi.org/10.1093/publius/pjm027
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/1522015-05-20HighWireOUPpublius:38:1
A Failure of Initiative: Final Report of the Select Bipartisan Committee to Investigate the Preparation for and Response to Hurricane Katrina (House of Representatives, February 15, 2006 www.gpoaccess.gov/katrinareport/mainreport.pdf) * The Federal Response to Hurricane Katrina Lessons Learned (White House staff, February 2006 www.whitehouse.gov/reports/katrina-lessons-learned/)
Landy, Marc
Review Essay
Oxford University Press
2008-01-01 00:00:00.0
TEXT
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http://publius.oxfordjournals.org/cgi/content/short/38/1/152
http://dx.doi.org/10.1093/publius/pjm024
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/222015-05-20HighWireOUPpublius:38:1
Medical Marijuana Policy and the Virtues of Federalism
Pickerill, J. Mitchell
Chen, Paul
Articles
We analyze the policy issue of medical marijuana to illustrate how key virtues of federalism can be used to make a threshold determination as to whether a particular public policy should be subject to federal regulation or reserved for states. When the substantive merits of the policy issue are currently debated and unresolved, and that issue area has traditionally been regulated by states, we employ a three-prong test for determining as a threshold matter whether the federal government should assert preemptive jurisdiction over the policy. That test has is roots in well-established theories of federalism that comprise what we refer to as the “classic virtues of federalism.” Based on our analysis, medical marijuana is a policy that should be left to the states.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/1/22
http://dx.doi.org/10.1093/publius/pjm033
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/562015-05-20HighWireOUPpublius:38:1
Aristocratic and Confederate Republicanism in Hamiltonian Thought and Practice
O’Hara, Jonathan
Articles
This article identifies and explores the presence of republican thought in the intellectual and policy writings of Alexander Hamilton, particularly as it applied to his theoretical understanding of the American executive branch. The article moves chronothematically, highlighting, through the Revolutionary, Constitutional, and Governmental periods of American political development, Hamilton's unique sense of republicanism with respect to international and domestic politics, as well as American political economy. The article not only attempts to demonstrate Hamilton's intellectual adherence to the republican tradition, but also his commitment to rhetorically applying the ideology to the realization of practical executive policy goals.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/1/56
http://dx.doi.org/10.1093/publius/pjm034
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:publius:38/1/812015-05-20HighWireOUPpublius:38:1
Challenges to Federalism: Homeland Security and Disaster Response
Scavo, Carmine
Kearney, Richard C.
Kilroy, Richard J.
Articles
This article examines the state of federalism in the Bush Administration from the perspective of the policy area of homeland security and disaster response. The article uses the International City and County Management Association homeland security survey completed in the spring and summer of 2005 as a source of data. The article argues that while it is tempting to look for one single agency to control homeland security and disaster response, a networked model is better supported by the survey data and by recent experience in terrorist and natural disaster response.
Oxford University Press
2008-01-01 00:00:00.0
TEXT
text/html
http://publius.oxfordjournals.org/cgi/content/short/38/1/81
http://dx.doi.org/10.1093/publius/pjm029
en
Copyright (C) 2008, CSF Associates Inc.
oai:open-archive.highwire.org:ptpsupp:95/0/12015-05-20HighWireOUPptpsupp:95:0
Review of the Wick-Cutkosky Model: --Spectral Properties in the Massless Ladder Model--
Nakanishi, Noboru
Articles
Reviewed is the Wick-Cutkosky model, namely, the ladder model of the Bethe-Salpeter equation for two (equal- or unequal-mass) scalar particles exchanging massless scalar bosons. The best results analytically obtained so far are summarized.
Oxford University Press
2013-08-02 00:00:00.0
TEXT
text/html
http://ptps.oxfordjournals.org/cgi/content/short/95/0/1
http://dx.doi.org/10.1143/PTPS.95.1
en
Copyright (C) 2013, The Physical Society of Japan
oai:open-archive.highwire.org:ptpsupp:95/0/252015-05-20HighWireOUPptpsupp:95:0
Review of the Spinor-Spinor Bethe-Salpeter Equation. Spectral Properties in the Massless Ladder Model
Setô, Noriaki
Articles
The theory of the Bethe-Salpeter equation for a bound state of two spinor particles in the ladder model of the massless spin 0 or 1 particle exchange is reviewed. Emphasis is laid on the behavior of the coupling-constant eigenvalue as a function of the bound state mass from the nonrelativistic region to the deep relativistic region.
Oxford University Press
2013-08-02 00:00:00.0
TEXT
text/html
http://ptps.oxfordjournals.org/cgi/content/short/95/0/25
http://dx.doi.org/10.1143/PTPS.95.25
en
Copyright (C) 2013, The Physical Society of Japan
oai:open-archive.highwire.org:ptpsupp:95/0/462015-05-20HighWireOUPptpsupp:95:0
Hyperfine Structure in Positronium
Murota, Toshiyuki
Articles
We survey the theoretical investigations on the energy levels of positronium, especially the ground state hyperfine structure. These investigations contain the perturbation theory of energy levels of the relativistic bound state, the gauge variance and invariance of the perturbational calculations and the contributions of the kernels of higher orders which cannot be neglected.
Oxford University Press
2013-08-02 00:00:00.0
TEXT
text/html
http://ptps.oxfordjournals.org/cgi/content/short/95/0/46
http://dx.doi.org/10.1143/PTPS.95.46
en
Copyright (C) 2013, The Physical Society of Japan
oai:open-archive.highwire.org:ptpsupp:95/0/782015-05-20HighWireOUPptpsupp:95:0
Bibliography of the Bethe-Salpeter Equation
Front Matter
Oxford University Press
2013-05-16 19:13:43.0
TEXT
text/html
http://ptps.oxfordjournals.org/cgi/content/short/95/0/78
http://dx.doi.org/10.1093/ptpsupp.95.78
en
Copyright (C) 2013, The Physical Society of Japan
oai:open-archive.highwire.org:ptpsupp:95/0/i2015-05-20HighWireOUPptpsupp:95:0
Preface
Nakanishi, N.
Front Matter
Oxford University Press
2013-05-16 19:13:43.0
TEXT
text/html
http://ptps.oxfordjournals.org/cgi/content/short/95/0/i
http://dx.doi.org/10.1093/ptpsupp.95.i
en
Copyright (C) 2013, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/12015-05-20HighWireOUPptp:110:1
Topological Excitation in an Antiferromagnetic Bose-Einstein Condensate
Duan, Yi-shi
Wang, Jun-ping
Liu, Xin
Zhang, Peng-ming
Articles
Two kinds of topological excitations, skyrmions and monopoles, are studied. It is revealed that these two types of excitations originate from different order parameter fields that reflect different spatial distributions of the Néel vector <f><inline-fig> <link locator="110-1-1-eq001"></inline-fig></f>. Critical phenomena of the generation and annihilation of skyrmion-antiskyrmion pairs are also discussed.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/1
http://dx.doi.org/10.1143/PTP.110.1
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1072015-05-20HighWireOUPptp:110:1
Unitarity Bound of the Wave Function Renormalization Constant
Higashijima, Kiyoshi
Itou, Etsuko
Articles
The wave function renormalization constant <it>Z</it>, the probability of finding a bare particle in the physical particle, usually satisfies the unitarity bound 0 ≤<it>Z</it> ≤1 in field theories without negative metric states. This unitarity bound implies the positivity of the anomalous dimension of the field in the one-loop approximation. In nonlinear sigma models, however, this bound is apparently broken because of the field dependence of the canonical momentum. The contribution of the bubble diagrams to the anomalous dimension can be negative, while the contributions from multi-particle states satisfy the positivity of the anomalous dimension, as expected. We derive the correct unitarity bound of the wave function renormalization constant.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/107
http://dx.doi.org/10.1143/PTP.110.107
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1152015-05-20HighWireOUPptp:110:1
Holographic Entropy Bound in Two-Dimensional Gravity
Fukuma, Masafumi
Miwa, Akitsugu
Takahashi, Kazuyoshi
Articles
Bousso's entropy bound for two-dimensional gravity is investigated in the lightcone gauge. It is shown that due to the Weyl anomaly, the null component of the energy-momentum tensor takes a nonvanishing value, and thus, combined with the conditions that were recently proposed by Bousso, Flanagan and Marolf, a holographic entropy bound similar to Bousso's is expected to hold in two dimensions. A connection of our result to that of Strominger and Thompson is also discussed.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/115
http://dx.doi.org/10.1143/PTP.110.115
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1272015-05-20HighWireOUPptp:110:1
Quantization via Star Products
Hori, Takayuki
Koikawa, Takao
Articles
We study quantization via star products. We investigate a quantization scheme in which a quantum theory is described entirely in terms of the function space without reference to a Hilbert space, unlike the formulation employing the Wigner functions. The associative law plays an essential role in excluding the unwanted solutions to the stargen-value equation. This is demonstrated explicitly with the <it>D</it>-dimensional harmonic oscillator.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/127
http://dx.doi.org/10.1143/PTP.110.127
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1372015-05-20HighWireOUPptp:110:1
Hybrid Superstrings in NS-NS Plane Waves
Kunitomo, Hiroshi
Articles
Using the hybrid formalism, superstrings in four-dimensional NS-NS plane waves are studied in a manifest supersymmetric manner. This description of the superstring is obtained through a field redefinition of the RNS worldsheet fields and defined as a topological <it>N</it>=4 string theory. The Hilbert space consists of two types of representations describing short and long strings. We study the physical spectrum to find boson-fermion asymmetry in the massless spectrum of the short string. Some massive spectra of the short string and the massless spectrum of the long string are also studied.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/137
http://dx.doi.org/10.1143/PTP.110.137
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1592015-05-20HighWireOUPptp:110:1
Gauge Fixing and Scattering Amplitudes in String Field Theory Expanded around Universal Solutions
Takahashi, Tomohiko
Zeze, Syoji
Articles
We study a gauge fixed action of open string field theory expanded around the universal solution, which has been found as an analytic classical solution with one parameter, <it>a</it>. for <it>a</it> > −1/2, we are able to reproduce open string scattering amplitudes in the theory fixed in the Siegel gauge. At <it>a</it> = −1/2, all scattering amplitudes vanish and there is no open string excitation in the gauge fixed theory. These results support the conjecture that the universal solution can be regarded as a pure gauge or the tachyon vacuum solution.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/159
http://dx.doi.org/10.1143/PTP.110.159
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1792015-05-20HighWireOUPptp:110:1
Neutrino Interactions in Octet Baryon Matter
Tatsumi, Toshitaka
Takatsuka, Tatsuyuki
Tamagaki, Ryozo
Letters
Neutrino processes caused by neutral current are studied in octet baryon matter. Confusion that has existed with regard to the baryonic matrix elements of the neutral current interaction is resolved, and a table of theoretical values relevant to these matrix elements that have been improved by consideration of the proton spin problem is presented.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/179
http://dx.doi.org/10.1143/PTP.110.179
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/1852015-05-20HighWireOUPptp:110:1
Chiral and Color-Superconducting Phase Transitions with Vector Interaction in a Simple Model
Kitazawa, Masakiyo
Koide, Tomoi
Kunihiro, Teiji
Nemoto, Yukio
Addenda
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/185
http://dx.doi.org/10.1143/PTP.110.185
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/252015-05-20HighWireOUPptp:110:1
A Classification of Spherically Symmetric Kinematic Self-Similar Perfect-Fluid Solutions. II
Maeda, Hideki
Harada, Tomohiro
Iguchi, Hideo
Okuyama, Naoya
Articles
We give a classification of spherically symmetric kinematic self-similar solutions. This classification is complementary to that given in a previous work by the present authors [Prog. Theor. Phys. <b>108</b> (2002), 819]. Dust solutions of the second, zeroth and infinite kinds, perfect-fluid solutions and vacuum solutions of the first kind are treated. The kinematic self-similarity vector is either parallel or orthogonal to the fluid flow in the perfect-fluid and vacuum cases, while the `tilted' case, i.e., neither parallel nor orthogonal case, is also treated in the dust case. In the parallel case, there are no dust solutions of the second (except when the self-similarity index α is 3/2), zeroth and infinite kinds, and in the orthogonal case, there are no dust solutions of the second and infinite kinds. Except in these cases, the governing equations can be integrated to give exact solutions. It is found that the dust solutions in the tilted case belong to a subclass of the Lemaître-Tolman-Bondi family of solutions for the marginally bound case. The flat Friedmann-Robertson-Walker (FRW) solution is the only dust solution of the second kind with α=3/2 in the tilted and parallel cases and of the zeroth kind in the orthogonal case. The flat, open and closed FRW solutions with <it>p</it>=-µ/3, where <it>p</it> and µ are the pressure and energy density, respectively, are the only perfect-fluid first-kind self-similar solutions in the parallel case, while a new exact solution with <it>p</it>=µ, which we call the “singular stiff-fluid solution”, is the only such solution in the orthogonal case. The Minkowski solution is the only vacuum first-kind self-similar solution both in the parallel and orthogonal cases. Some important corrections and complements to the authors' previous work are also presented.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/25
http://dx.doi.org/10.1143/PTP.110.25
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/652015-05-20HighWireOUPptp:110:1
Application of the Adiabatic Self-Consistent Collective Coordinate Method to a Solvable Model of Prolate-Oblate Shape Coexistence
Kobayasi, Masato
Nakatsukasa, Takashi
Matsuo, Masayuki
Matsuyanagi, Kenichi
Articles
The adiabatic self-consistent collective coordinate method is applied to an exactly solvable multi-<it>O</it>(4) model that is designed to describe nuclear shape coexistence phenomena. The collective mass and dynamics of large amplitude collective motion in this model system are analyzed, and it is shown that the method yields a faithful description of tunneling motion through a barrier between the prolate and oblate local minima in the collective potential. The emergence of the doublet pattern is clearly described.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/65
http://dx.doi.org/10.1143/PTP.110.65
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/92015-05-20HighWireOUPptp:110:1
A Model for Period Clustering of Long-Period Pulsars
Takahashi, Koichi
Articles
We explore the possibility that the <it>P</it> — distribution of observed pulsars can be understood in terms of a model of a rotating neutron star that possesses two types of magnetic fields, a fossil magnetic field of <it>O</it>(1010–13) G at the stellar surface, and the field due to the ferromagnetic core of a neutron star, which is assumed to be of <it>O</it>(1014–15 ) G. This model, when combined with the assumption of an appropriate mass distribution, together with the observational selection effect on an assumed magnetic dipole pulse luminosity proportional to <it>P</it>−4 , is shown to be consistent with the ‘period clustering’ of the observed SGRs and AXPs.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/9
http://dx.doi.org/10.1143/PTP.110.9
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/1/932015-05-20HighWireOUPptp:110:1
Simple E6 Unification with Anomalous U(1)A Symmetry
Maekawa, Nobuhiro
Yamashita, Toshifumi
Articles
We propose Higgs sectors in <it>E</it><inf>6</inf> grand unified theory (GUT) with anomalous <it>U</it>(1)<inf>A</inf> gauge symmetry that are simpler than that of a previous model [N. Maekawa and T. Yamashita, Prog. Theor. Phys. <b>107</b> (2002), 1201]. In these new Higgs sectors, as in the previous one, the doublet-triplet (DT) splitting can be realized in a natural way, while proton decay via dimension 5 operators is suppressed, and gauge coupling unification is also realized without fine-tuning. Combining the matter sector, simple complete GUTs can be obtained. Since the Higgs sector is simpler, it is possible for the gauge coupling constant at the cutoff scale to be in the perturbative region, and therefore, the estimated value of the lifetime of a nucleon in this model, τ<inf>p</inf> (<it>p</it> →<it>e</it>+π0) ∼5 ×1033 years, is more reliable.
Oxford University Press
2003-07-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/1/93
http://dx.doi.org/10.1143/PTP.110.93
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:jmt:1/4/1172015-05-20HighWireOUPjmt:1:4
Music's Silver Sound
Wescoe, W. Clarke
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/117
http://dx.doi.org/10.1093/jmt/1.4.117
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1212015-05-20HighWireOUPjmt:1:4
Change and Permanence
Schneider, Erwin H.
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/121
http://dx.doi.org/10.1093/jmt/1.4.121
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1242015-05-20HighWireOUPjmt:1:4
Orchestration of the New Mental Hospital Theme
Stanford, George A
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/124
http://dx.doi.org/10.1093/jmt/1.4.124
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1292015-05-20HighWireOUPjmt:1:4
Adaptive Behavior as Related to the Treatment of the Mentally Retarded
Leland, Henry
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/129
http://dx.doi.org/10.1093/jmt/1.4.129
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1322015-05-20HighWireOUPjmt:1:4
Music Therapy as a Means of Changing the Adaptive Behavior Level of Retarded Children
Lathom, Wanda
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/132
http://dx.doi.org/10.1093/jmt/1.4.132
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1352015-05-20HighWireOUPjmt:1:4
Music and Creative Arts Therapy for an Autistic Child
Goldstein, Carol
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/135
http://dx.doi.org/10.1093/jmt/1.4.135
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1392015-05-20HighWireOUPjmt:1:4
Music in Special Education
Betty, Isern
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/139
http://dx.doi.org/10.1093/jmt/1.4.139
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1432015-05-20HighWireOUPjmt:1:4
Music Therapy from Auditory Ink Blots
Bean, Kenneth L.
Moore, Jack R.
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/143
http://dx.doi.org/10.1093/jmt/1.4.143
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1482015-05-20HighWireOUPjmt:1:4
Developments in the Training of Music Therapists
Gaston, E. Thayer
Articles
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/148
http://dx.doi.org/10.1093/jmt/1.4.148
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1512015-05-20HighWireOUPjmt:1:4
Report on the Fifteenth Annual Conference
Report on the Fifteenth Annual Conference
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/151
http://dx.doi.org/10.1093/jmt/1.4.151
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1532015-05-20HighWireOUPjmt:1:4
Announcements
Departments
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/153
http://dx.doi.org/10.1093/jmt/1.4.153
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1542015-05-20HighWireOUPjmt:1:4
Professional Opportunities
Departments
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/154
http://dx.doi.org/10.1093/jmt/1.4.154
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/1562015-05-20HighWireOUPjmt:1:4
The Authors
Departments
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/156
http://dx.doi.org/10.1093/jmt/1.4.156
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:jmt:1/4/156-a2015-05-20HighWireOUPjmt:1:4
Index to Volume 1-1964
Index to Volume 1
Oxford University Press
1964-12-01 00:00:00.0
TEXT
text/html
http://jmt.oxfordjournals.org/cgi/content/short/1/4/156-a
http://dx.doi.org/10.1093/jmt/1.4.156-a
en
Copyright (C) 1964, American Music Therapy Association
oai:open-archive.highwire.org:ptp:110/2/1872015-05-20HighWireOUPptp:110:2
Shock Structures and Velocity Fluctuations in the Noisy Burgers and KdV-Burgers Equations
Sakaguchi, Hidetsugu
Articles
Statistical properties of the noisy Burgers and KdV-Burgers equations are numerically studied. It is found that shock-like structures appear in the time-averaged patterns for the case of stepwise fixed boundary conditions. Our results show that the shock structure for the noisy KdV-Burgers equation has an oscillating tail, even for the time-averaged pattern. Also, we find that the width of the shock and the intensity of the velocity fluctuations in the shock region increase with system size.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/187
http://dx.doi.org/10.1143/PTP.110.187
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/1952015-05-20HighWireOUPptp:110:2
Supernova Cosmology and the Fine Structure Constant
Chiba, Takeshi
Kohri, Kazunori
Articles
We study the dependence of the peak luminosity of Type Ia supernovae on the fine structure constant α. We find that decreasing (increasing) α enhances (reduces) the luminosity. Future experiments like SNAP could determine the variation of α to a precision of 10−2.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/195
http://dx.doi.org/10.1143/PTP.110.195
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/2012015-05-20HighWireOUPptp:110:2
Comparison of the Oscillatory Behavior of a Gravitating Nambu-Goto String and a Test String
Nakamura, Kouji
Articles
Comparison of the oscillatory behavior of a gravitating infinite Nambu-Goto string and a test string is investigated using the general relativistic gauge invariant perturbation technique with two infinitesimal parameters on a flat spacetime background. Due to the existence of the <it>pp</it>-wave exact solution, we see that the conclusion that the dynamical degree of freedom of an infinite Nambu-Goto string is completely determined by that of gravitational waves, which was reached in our previous works [K. Nakamura, A. Ishibashi and H. Ishihara, Phys. Rev. D <b>62</b> (2002), 101502(R); K. Nakamura and H. Ishihara, Phys. Rev. D <b>63</b> (2001), 127501], is not contrary to the dynamics of a test string. We also briefly discuss the implication of this result.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/201
http://dx.doi.org/10.1143/PTP.110.201
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/2332015-05-20HighWireOUPptp:110:2
Study of Resonance States in a Coupled-Channel System with the Jost Function Method Applying the Orthogonality Condition Model
Masui, Hiroshi
Kurokawa, Chie
Kato, Kiyoshi
Articles
To study resonant and virtual states in a wide variety of nuclear systems, we develop the Jost function method (JFM) for treating systems having non-local potentials. In the case that the Pauli principle for nucleons between clusters is treated by applying the orthogonality condition model (OCM) to the JFM, the pseudo-potential of the OCM can be considered one of the non-local potentials. As examples to demonstrate the applicability of our method, we apply it to a 16O+α single-channel system and also a 9Li+<it>n</it> coupled-channel system. We also treat a 16O+<it>n</it> single-channel system with a knock-on exchange kernel to confirm that our method is applicable in more general cases having non-local potentials.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/233
http://dx.doi.org/10.1143/PTP.110.233
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/2472015-05-20HighWireOUPptp:110:2
Flavor Violation in Supersymmetric Theories with Gauged Flavor Symmetries
Kobayashi, Tatsuo
Nakano, Hiroaki
Terao, Haruhiko
Yoshioka, Koichi
Articles
In this paper, we study flavor violation in supersymmetric models with gauged flavor symmetries. There are several sources of flavor violation in these theories. The dominant flavor violation is the tree-level <it>D</it>-term contribution to scalar masses generated by flavor symmetry breaking. We present a new approach for suppressing these phenomenologically dangerous effects by separating the flavor-breaking sector from the supersymmetry-breaking sector. This separation can be achieved either in geometrical setups or in a dynamical way. We also point out that radiative corrections from the gauginos of gauged flavor symmetries can yield sizable generation-dependent masses of scalars. Generically the gaugino mass effects are not suppressed, even if the dominant <it>D</it>-term contribution is suppressed. We also analyze the constraints on the flavor symmetry sector resulting from these flavor-violating corrections.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/247
http://dx.doi.org/10.1143/PTP.110.247
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/2692015-05-20HighWireOUPptp:110:2
A Study of Accelerating Cosmologies from Superstring/M Theories
Ohta, Nobuyoshi
Articles
We study aspects of the accelerating cosmologies obtained from the compactification of the vacuum solution and S2-branes of superstring/M theories. The parameter dependence of the resulting expansion of our universe and internal space is examined for all cases. We find that accelerated expansions are obtained also from spherical internal spaces, albeit the solution enters a contracting phase eventually. The relation between the models of SM2- and SD2-branes is also discussed, and a potential problem with the SD2-brane model is noted.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/269
http://dx.doi.org/10.1143/PTP.110.269
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/2852015-05-20HighWireOUPptp:110:2
Open Wilson Lines as States of Closed String
Murakami, Koichi
Nakatsu, Toshio
Articles
A system of a D-brane in bosonic string theory on a constant <it>B</it> field background is studied in order to obtain further insight into the bulk-boundary duality. Boundary states which describe arbitrary numbers of open-string tachyons and gluons are given. The UV behavior of field theories on the non-commutative world-volume is investigated by using these states. We take the zero-slope limits of the generating functions of one-loop amplitudes of gluons (and open-string tachyons) in which the region of the small open-string proper time is magnified. The existence of a <it>B</it> field allows the limits to be slightly different from the standard field theory limits of a closed-string. These limits enable us to obtain world-volume theories at a trans-string scale. In this limit the generating functions are shown to be factorized into two curved open Wilson lines (and their analogues) and become integrals on the space of paths with a Gaussian distribution around straight lines. These facts indicate the possibility that field theories on the non-commutative world-volume are topological at such a trans-string scale. We also give a proof of the Dhar-Kitazawa conjecture by determining an explicit correspondence between the closed-string states and the paths. Momentum eigenstates of closed-string or momentum loops also play an important role in these analyses.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/285
http://dx.doi.org/10.1143/PTP.110.285
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/3852015-05-20HighWireOUPptp:110:2
N5/3 Law for Bosons for Arbitrary Large N
Manoukian, E. B.
Muthaporn, C.
Articles
A rigorous upper bound is derived for the exact ground-state energy of <it>N</it> negatively charged bosons interacting via the Coulomb potential with infinitely massive <it>N</it> positively charged particles valid for <it>arbitrary</it> <it>N</it> ≥8.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/385
http://dx.doi.org/10.1143/PTP.110.385
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/2/3932015-05-20HighWireOUPptp:110:2
Comment on the Geometric Interpretation of Ito Calculus on a Lattice
Nakazawa, Naohito
Letters
The covariant nature of the Langevin equation in Itō calculus is clarified in the application of the stochastic quantization method to <it>U</it>(<it>N</it>) lattice gauge theory. The stochastic process is expressed in a manifestly general coordinate covariant form as a collective field theory on the group manifold. A geometric interpretation is given in the sense of Itō for the Langevin equation and the corresponding Fokker-Planck equation.
Oxford University Press
2003-08-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/2/393
http://dx.doi.org/10.1143/PTP.110.393
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/3992015-05-20HighWireOUPptp:110:3
Quasi-Exact-Solution of the Generalized E {otimes}{varepsilon} Jahn-Teller Hamiltonian
Koç, Ramazan
Tütüncüler, Hayriye
Koca, Mehmet
Körcük, Eser
Articles
We consider the solution of a generalized <it>E</it> ⊗<it>ϵ</it> Jahn-Teller Hamiltonian in the context of quasi-exactly solvable spectral problems. This Hamiltonian is expressed in terms of the generators of the <it>osp</it>(2,2) Lie algebra. Analytical expressions are obtained for eigenstates and eigenvalues. The solutions lead to a number of earlier results discussed in the literature. However, our approach renders a new understanding of “exact isolated” solutions.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/399
http://dx.doi.org/10.1143/PTP.110.399
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4072015-05-20HighWireOUPptp:110:3
Semiclassical Coherent State Path Integral around a Classically Realizable Trajectory
Tanaka, Atushi
Articles
The structure of the semiclassical Feynman kernel in the coherent state representation is studied. The analysis is focused on classically realizable (i.e. real-valued) trajectories, whose contributions to the semiclassical kernel persist in the limit ħ→0. A smooth deformation of the real-valued guiding trajectory that starts from the center of the “initial” coherent state and obeys the Hamilton equation induces complex-valued trajectories that contribute to the semiclassical kernel “linearized” around the guiding trajectory. The linearized semiclassical kernel describes Heller's Gaussian wavepacket dynamics (GWD). Two mechanisms that break the GWD approximation are studied in terms of the semiclassical coherent state path integral. The rate at which a caustic approaches the guiding trajectory is estimated. In addition, the deviation of the semiclassical kernel from a Gaussian shape is estimated, with the assumption that the influence of caustics is negligible. These results provide an estimation of departure times between classical and quantum evolutions. In particular, for classically integrable systems, the present argument elucidates that the departure time due to caustics is much larger than that due to the deviation from a Gaussian shape. Furthermore, a disagreement between the estimations of the departure times obtained from the Husimi representation and the Wigner representation is pointed out.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/407
http://dx.doi.org/10.1143/PTP.110.407
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4252015-05-20HighWireOUPptp:110:3
A Parametric Representation of Critical Curves and Caustics for a Binary Gravitational Lens
Asada, Hideki
Articles
We find a simple expression for critical curves of a binary gravitational lens. On the basis of this, we present a parametric representation of such curves. The caustics can also be expressed with the same parameterization. The present result is helpful for efficiently constructing many templates of light curves due to binary systems, particularly extrasolar planets, which cause spikes in the light curves when a source crosses the caustics.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/425
http://dx.doi.org/10.1143/PTP.110.425
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4332015-05-20HighWireOUPptp:110:3
Mass of the Dilaton and the Cosmological Constant
Fujii, Yasunori
Articles
One might raise the question if the gravitational scalar field (dilaton) mediates a finite-range force between local objects that behaves globally like a massless field in conformity with the scenario of a decaying cosmological constant. We obtain a non-negative answer to this question by carrying out a detailed analysis of the field-theoretical quantization procedure taking into account the observationally required suppression of the vacuum energy which constitutes a part of the cosmological constant.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/433
http://dx.doi.org/10.1143/PTP.110.433
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4412015-05-20HighWireOUPptp:110:3
Newton's Law on an Einstein "Gauss-Bonnet" Brane
Deruelle, Nathalie
Sasaki, Misao
Articles
It is known that Newton's law of gravity holds asymptotically on a flat “brane” embedded in an anti-de Sitter “bulk”; this was shown not only when gravity in the bulk is described by Einstein's theory but also in Einstein “Lanczos Lovelock Gauss-Bonnet”'s theory. We give here the expressions for the corrections to Newton's potential in both theories, <it>in analytic form and valid for all distances</it>. We find that in Einstein's theory the transition from the 1/<it>r</it> behaviour at small <it>r</it> to the 1/<it>r</it>2 one at large <it>r</it> is quite slow. In the Einstein Gauss-Bonnet case on the other hand, we find that the correction to Newton's potential can be small for <it>all</it> <it>r</it>. Hence, Einstein Gauss-Bonnet equations in the bulk (rather than simply Einstein's) induce on the brane a better approximation to Newton's law.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/441
http://dx.doi.org/10.1143/PTP.110.441
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4572015-05-20HighWireOUPptp:110:3
Dilaton Stabilization in (A)dS Spacetime with Compactified Dimensions
Uzawa, Kunihito
Articles
We investigate dilaton stabilization in a higher-dimensional theory. The background geometry is based on an eleven-dimensional Kaluza-Klein/supergravity model, which is assumed to be a product of four-dimensional de Sitter (<it>dS</it><inf>4</inf>) spacetime and a seven sphere (<it>S</it>7). The dilaton potential has a local minimum resulting from contributions of the cosmological constant, the curvature of the internal spacetime and quantum effects of the background scalar, vector, spinor, and tensor fields. The dilaton settles down to the local minimum, and the scale of the extra dimensions eventually become time independent. Our four-dimensional universe evolves from <it>dS</it><inf>4</inf> into <it>AdS</it><inf>4</inf> after stabilization of the extra dimension.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/457
http://dx.doi.org/10.1143/PTP.110.457
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/4992015-05-20HighWireOUPptp:110:3
Correlation Analysis of Quantum Fluctuations and Repulsion Effects of Classical Dynamics in SU(3) model
Fujiwara, Shigeyasu
Sakata, Fumihiko
Articles
In many quantum systems, random matrix theory has been used to characterize quantum level fluctuations, which is known to be a quantum correspondent to a regular-to-chaos transition in classical systems. We present a new qualitative analysis of quantum and classical fluctuation properties by exploiting correlation coefficients and variances. It is shown that the correlation coefficient of the quantum level density is roughly inversely proportional relation to the variance of consecutive phase-space point spacings on the Poincaré section plane.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/3/499
http://dx.doi.org/10.1143/PTP.110.499
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/5172015-05-20HighWireOUPptp:110:3
Deformed Boson Scheme Stressing Even-Odd Boson Number Difference. I: Various Forms of Boson-Pair Coherent State
Kuriyama, Atsushi
Providência, Constança
Providência, João da
Tsue, Yasuhiko
Yamamura, Masatoshi
Articles
An idea for a deformed boson scheme developed by the present authors is applied to the case of boson-pair coherent state. In this state, the even and odd boson number difference is stressed and various concrete examples of boson-pair coherent states are given. Concerning some of them, mutual relations are investigated in connection to the <it>su</it>(1,1)-algebra. A formulation in terms of the MYT boson mapping is also presented.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/3/517
http://dx.doi.org/10.1143/PTP.110.517
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/5492015-05-20HighWireOUPptp:110:3
Calculation of Magnetic Penguin Amplitudes in B ->{varphi}K Decays Using PQCD Approach
Mishima, Satoshi
Sanda, A. I.
Articles
New physics contributions to <it>B</it> decays often arise through chromo-magnetic penguin operators. To look for new physics effects in <it>B</it> decays, it is useful to be able to estimate the hadronic matrix elements for the chromo-magnetic operator. We compute this contribution to <it>B</it> →ϕ<it>K</it> decays using PQCD methods. It is shown that, if the Wilson coefficient of the new physics is same order of magnitude as that of the Standard Model, this operator gives a non-negligible contribution compared to that of the Standard Model (about 30%). We also investigate the value of <it>q</it>2, which is the momentum transferred by the gluon in the chromo-magnetic penguin operator. We find that the expectation value ≪<it>q</it>2 > is approximately <it>M</it>2<inf><it>B</it></inf>/4, in agreement with a naive guess. This result, however, is very sensitive to the scale dependence of the Wilson coefficient. We also show that the matrix element for the chromo-magnetic penguin operator is independent of the choice of energy scale to a very good approximation.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/549
http://dx.doi.org/10.1143/PTP.110.549
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/5632015-05-20HighWireOUPptp:110:3
Three Dimensional Nonlinear Sigma Models in the Wilsonian Renormalization Method
Higashijima, Kiyoshi
Itou, Etsuko
Articles
The three dimensional nonlinear sigma model is nonrenormalizable within the perturbative method. Using the β function in the nonperturbative Wilsonian renormalization group method, we argue that some <f><inline-fig> <link locator="110-3-563-eq001"></inline-fig></f> supersymmetric nonlinear σ models are renormalizable in three dimensions. When the target space is an Einstein-Kähler manifold with positive scalar curvature, such as C<it>P</it>N or <it>Q</it>N, there are nontrivial ultraviolet (UV) fixed points, which can be used to define the nontrivial renormalized theory. if the target space has a negative scalar curvature, however, the theory has only an infrared Gaussian fixed point, and the meaningful continuum theory cannot be defined. We also construct a model that interpolates between the C<it>P</it>N and <it>Q</it>N models with two coupling constants. This model has two non-trivial UV fixed points that can be used to define a nontrivial renormalized theory. Finally, we construct a class of conformal field theories with <it>SU</it>(<it>N</it>) symmetry, defined at the fixed point of the nonperturbative β function. These conformal field theories have a free parameter corresponding to the anomalous dimension of the scalar fields. If we choose a specific value of this parameter, we recover the conformal field theory defined at the UV fixed point of the C<it>P</it>N model, and the symmetry is enhanced to <it>SU</it>(<it>N</it>+1).
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/563
http://dx.doi.org/10.1143/PTP.110.563
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/5792015-05-20HighWireOUPptp:110:3
Cubic Matrices, Generalized Spin Algebra and Uncertainty Relation
Kawamura, Yoshiharu
Articles
We propose a generalization of spin algebra using three-index objects. Our results suggest the possibility that a triple commutation relation among three-index objects implies a kind of uncertainty relation involving their expectation values.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/579
http://dx.doi.org/10.1143/PTP.110.579
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/5892015-05-20HighWireOUPptp:110:3
Caustics in the Grassmann Integral
Kashiwa, Taro
Sakaguchi, Tomohiko
Articles
It is shown that a simple model of 2<it>N</it>-Grassmann variables with a four-body coupling involves caustics after the integral is converted to a bosonic form with the aid of an auxiliary field. In order to check the validity of the auxiliary field method (AFM), approximations in terms of 1/<it>N</it> near a saddle point and <f><inline-fig> <link locator="110-3-589-eq001"></inline-fig></f> near a caustic, are carried out. It turns out that even for <it>N</it>=2, the smallest value of <it>N</it> for which a four-body interaction exists, AFM is increasingly accurate as higher order effects are taken into account.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/589
http://dx.doi.org/10.1143/PTP.110.589
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/6052015-05-20HighWireOUPptp:110:3
Clock-Controlled Prey-Predator Dynamics: Temporal Segregation of Activities
Daido, Hiroaki
Letters
A new type of mathematical model of prey-predator dynamics is proposed. This model takes into account the fact that the daily activities of animals are governed by their body clocks. On the basis of it, we investigate the conditions under which the prey and predator can segregate into diurnal and nocturnal habits on a timescale that is short compared to evolutionary timescales.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/605
http://dx.doi.org/10.1143/PTP.110.605
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/3/6112015-05-20HighWireOUPptp:110:3
Free Motion of a Particle in the Quantized Space
Yamaguchi, Yoshio
Letters
Assuming that the momentum space for a particle is the surface of the 4 dimensional sphere (radius <it>K</it>) and its position vector <it>x</it><inf>i</inf> is given by boost operators <it>B</it><inf>i</inf> multiplied by 1/<it>K</it> in the same 4 dimensional Eucledian space, one can construct quantum mechanics. This theory predicts that the very high energy paticles run at the velocity slower (or faster) than light velocity (depending upon a choice of the Hamiltonian of particles), which may be tested by proton beams in LHC, or even by SPS or Tevatron.
Oxford University Press
2003-09-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/3/611
http://dx.doi.org/10.1143/PTP.110.611
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/6152015-05-20HighWireOUPptp:110:4
Lattice QCD at Finite Density: An Introductory Review
Muroya, Shin
Nakamura, Atsushi
Nonaka, Chiho
Takaishi, Tetsuya
Invited Papers
This is a pedagogical review of the lattice study of finite density QCD. It is intended to provide the minimum necessary content, so that it may be used as an introduction for newcomers to the field and also for those working in nonlattice areas. After a brief introduction in which we discuss the reasons that finite density QCD is an active and important subject, we present the fundamental formulae that are necessary for the treatment given in the following sections. Next, we survey lattice QCD simulational studies of system with small chemical potentials, of which there have been several prominent works reported recently. then, two-color QCD calculations are discussed, where we are free from the notorious phase problem and have a chance to consider many new features of finite density QCD. Of special note is the result of recent simulations indicating quark pair condensation and the in-medium effect. Tables of <it>SU</it>(3) and <it>SU</it>(2) lattice simulations at finite baryon density are given. In the next section, we survey several related works that may represent a starting point of future development, although some of these works have not attracted much attention yet. This material is described in a pedagogical manner. Starting from a simple 2-d model, we briefly discuss a lattice analysis of the NJL model. We describe a non-perturbative analytic approach, i.e., the strong coupling approximation method and some results. The canonical ensemble approach, instead of the usual grand canonical ensemble may be another route to reach high density. We examine the density of state method and show that this old idea includes the recently proposed factorization method. An alternative method, the complex Langevin equation, and an interesting model, the finite isospin model, are also discussed. We give brief comments on a partial sum with respect to <it>Z</it><inf>3</inf> symmetry and the meron-cluster algorithm, which might solve the sign problem partially or completely. In the Appendix, we discuss several technical points that are useful in practical calculations.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/615
http://dx.doi.org/10.1143/PTP.110.615
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/6692015-05-20HighWireOUPptp:110:4
Operational Phase Operators and Hermitian Phase Operators
Kakazu, Kiyotaka
Articles
It is shown that there exist two kinds of operational (or measured) phase operators, those of the Hradil type [Phys. Rev. A <b>47</b> (1993), 4532], defined on the entire Hilbert space, and those of the Noh-Fougères-Mandel type [Phys. Rev. A <b>45</b> (1992), 424], defined only on a subspace. As a consequence, strictly speaking, the Noh-Fougères-Mandel measured phase cannot be defined in the case of, for example, coherent states, squeezed states and the vacuum. The difference between these operators is made clear by using the concept of the Bargmann distance between a quantum state and its “reduced” state. Since Noh et al. did not use the correct variances of the Susskind-Glogower and Pegg-Barnett phase operators when they compared their data with the results predicted through use of these operators, the correct expressions in that case are presented. Comparing the measured operators with the Hermitian phase operator in the extended Susskind-Glogower formalism, we show that the quantum phase given by the Hermitian phase operator is more appropriate than the measured phases. The variance of the Hermitian operator in the vacuum is consistent with the complementarity of the photon number and phase, which implies that the vacuum has a uniform phase distribution. Hradil's measured operator does not have such a property. Although the Noh-Fougères-Mandel operator has such a property in a particular limit, this operator does not represent, in principle, a meaningful measure of the phase measurement in a typical quantum region, because the Bargmann distance becomes large in such a region.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/669
http://dx.doi.org/10.1143/PTP.110.669
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/6912015-05-20HighWireOUPptp:110:4
Stable Optimization of a Tensor Product Variational State
Gendiar, Andrej
Maeshima, Nobuya
Nishino, Tomotoshi
Articles
We consider a variational problem for three-dimensional (3D) classical lattice models. We construct the trial state as a two-dimensional product of local variational weights that contain auxiliary variables. We propose a stable numerical algorithm for the maximization of the variational partition function per layer. The numerical stability and efficiency of the new method are examined through its application to the 3D Ising model.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/691
http://dx.doi.org/10.1143/PTP.110.691
en
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oai:open-archive.highwire.org:ptp:110/4/7012015-05-20HighWireOUPptp:110:4
A Master Equation for Gravitational Perturbations of Maximally Symmetric Black Holes in Higher Dimensions
Kodama, Hideo
Ishibashi, Akihiro
Articles
We show that in four or more spacetime dimensions, the Einstein equations for gravitational perturbations of maximally symmetric vacuum black holes can be reduced to a single second-order wave equation in a two-dimensional static spacetime, irrespective of the mode of perturbations. Our starting point is the gauge-invariant formalism for perturbations in an arbitrary number of dimensions developed by the present authors, and the variable for the final second-order master equation is given by a simple combination of gauge-invariant variables in this formalism. Our formulation applies to the case of non-vanishing as well as vanishing cosmological constant Λ. The sign of the sectional curvature <it>K</it> of each spatial section of equipotential surfaces is also kept general. In the four-dimensional Schwarzschild background with Λ=0 and <it>K</it>=1, the master equation for a scalar perturbation is identical to the Zerilli equation for the polar mode and the master equation for a vector perturbation is identical to the Regge-Wheeler equation for the axial mode. Furthermore, in the four-dimensional Schwarzschild-anti-de Sitter background with Λ≪0 and <it>K</it>=0,1, our equation coincides with those recently derived by Cardoso and Lemos. As a simple application, we prove the perturbative stability and uniqueness of four-dimensional non-extremal spherically symmetric black holes for any Λ. We also point out that there exists no simple relation between scalar-type and vector-type perturbations in higher dimensions, unlike in four dimension. Although in the present paper we treat only the case in which the horizon geometry is maximally symmetric, the final master equations are valid even when the horizon geometry is described by a generic Einstein manifold, if we employ an appropriate reinterpretation of the curvature <it>K</it> and the eigenvalues for harmonic tensors.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/701
http://dx.doi.org/10.1143/PTP.110.701
en
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oai:open-archive.highwire.org:ptp:110/4/7232015-05-20HighWireOUPptp:110:4
Gauge Invariant Variables in Two-Parameter Nonlinear Perturbations
Nakamura, Kouji
Articles
The procedure to find gauge invariant variables for two-parameter nonlinear perturbations in general relativity is considered. for each order metric perturbation, we define the variable which is defined by the appropriate combination with lower order metric perturbations. Under the gauge transformation, this variable is transformed in the manner similar to the gauge transformation of linear order metric perturbation. We confirm this up to third order. This implies that gauge invariant variables for higher order metric perturbations can be found by using a procedure similar to that for linear order metric perturbations. We also derive gauge invariant combinations for the perturbation of an arbitrary physical variable, other than the spacetime metric, up to third order.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/723
http://dx.doi.org/10.1143/PTP.110.723
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/7572015-05-20HighWireOUPptp:110:4
Imperfect Bose System and Its Mixed State Representation. II: Numerical Analysis with a Short-Range Replusive Force
Kuriyama, Atsushi
Providência, João da
Tsue, Masahiko
Yamamura, Masatoshi
Articles
Using the framework provided by the mixed state representation, we numerically study the thermal behavior of a spinless bose system with a short-range repulsive interaction. The main aim of this work is to elucidate the character of the transition from a condensed phase to a non-condensed phase in a homogeneous system. Under the approximation of dilute density, the transition appears to be first order. A consistent treatment gives rise to a second-order transition.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/757
http://dx.doi.org/10.1143/PTP.110.757
en
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oai:open-archive.highwire.org:ptp:110/4/7692015-05-20HighWireOUPptp:110:4
Final State Interactions in Kaon Decays Revisited
Uehara, Masayuki
Articles
We examine the effects of final state interactions (FSI) in kaon decays in a new scheme, in which FSI is described in terms of on-shell quantities instead of the Omnés function, and we show that while it is not possible to explain the Δ<it>I</it>=1/2 rule in terms of FSI alone, the ratio ϵ′/ϵ∼16×10−4 is obtained through FSI, if the calculation is restricted to the <it>C</it><it>P</it>-violating parts. The ππ contribution to the <it>m</it><inf>L</inf>-<it>m</it><inf>S</inf> mass difference is shown to be about 14%, if the sizes of the <it>CP</it> conserving amplitudes ∣<it>A</it><inf>0</inf>∣ and ∣<it>A</it><inf>2</inf>∣ are correctly given.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/769
http://dx.doi.org/10.1143/PTP.110.769
en
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oai:open-archive.highwire.org:ptp:110/4/7772015-05-20HighWireOUPptp:110:4
Chiral Phase Transitions in QED at Finite Temperature: Dyson-Schwinger Equation Analysis in the Real Time Hard-Thermal-Loop Approximation
Fueki, Yuko
Nakkagawa, Hisao
Yokota, Hiroshi
Yoshida, Koji
Articles
In order to clarify the essential thermal effects that govern the chiral phase transition at finite temperature, we investigate, in the real-time thermal QED, the consequences of the hard-thermal-loop (HTL) resummed Dyson-Schwinger equation for the physical fermion mass function Σ<inf>R</inf>. Since Σ<inf>R</inf> is the mass function of an “unstable” quasi-particle in thermal field theories, it necessarily has non-trivial imaginary parts, together with non-trivial wave function renormalization constants. Analyses so far have completely disregarded this fact, despite it being one of the basic outcomes of thermal field theory. The “approximation”, which ignores the imaginary parts of Σ<inf>R</inf>, gives (non-trivial) constraint equations to be solved simultaneously. for this reason, this approximation cannot be applied consistently except in the trivial case, Σ<inf>R</inf> = 0. In the present analysis we correctly take this fact into account, and study, in the ladder approximation, the effect of the HTL resummed gauge boson propagator. Our results obtained using numerical analysis, reveal two facts: i) the chiral phase transition is of second order, since the fermion mass is dynamically generated at a critical value of the temperature <it>T</it><inf>c</inf>, or at a critical coupling constant α<inf>c</inf>, without any discontinuity; and ii) the critical temperature <it>T</it><inf>c</inf> at a fixed value of α is significantly lower than that obtained previously, which means that the restoration of chiral symmetry occurs at a lower temperature than previously expected. The second fact shows the importance of correctly incorporating the essential thermal effect into the analysis of the chiral phase transition. A procedure for taking account of the gauge invariance in the present approximation is also discussed.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/4/777
http://dx.doi.org/10.1143/PTP.110.777
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/7912015-05-20HighWireOUPptp:110:4
Phase Structures of SU(N) Gauge-Higgs Models on Multiply Connected Spaces
Hatanaka, Hisaki
Ohnishi, Katsuhiko
Sakamoto, Makoto
Takenaga, Kazunori
Articles
We study an <it>S</it><it>U</it>(<it>N</it>) gauge-Higgs model with <it>N</it><inf>F</inf> massless fundamental fermions on <it>M</it>3⊗<it>S</it>1. The model has two kinds of order parameters for gauge symmetry breaking: the component gauge field for the <it>S</it>1 direction (Hosotani mechanism) and the Higgs field (Higgs mechanism). We find that the model possesses three phases, Hosotani, Higgs and coexisting phases for odd <it>N</it>, while for even <it>N</it>, the model has only two phases, the Hosotani and coexisting phases. The phase structure depends on a parameter in the model and the size of the extra dimension. The critical radius and the order of the phase transition are determined. We also consider the case in which the representation of matter fields under the gauge group is changed. We present some models in which there is only one phase for any values of the model parameters and the size of the extra dimension.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/4/791
http://dx.doi.org/10.1143/PTP.110.791
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/8192015-05-20HighWireOUPptp:110:4
q-Deformed and c-Deformed Harmonic Oscillators
Sogami, Ikuo S.
Koizumi, Kouzou
Mir-Kasimov, Rufat M.
Articles
Hamilton functions of classical deformed oscillators (<it>c</it>-deformed oscillators) are derived from Hamiltonians of <it>q</it>-deformed oscillators of the Macfarlane and Dubna types. A new scale parameter, <it>l</it><inf>q</inf>, with the dimension of length, is introduced to relate a dimensionless parameter characterizing the deformation with the natural length of the harmonic oscillator. Contraction from <it>q</it>-deformed oscillators to <it>c</it>-deformed oscillators is accomplished by keeping <it>l</it><inf>q</inf> finite while taking the limit bar→0. The <it>c</it>-deformed Hamilton functions for both types of oscillators are found to be invariant under discrete translations: the step of the translation for the Dubna oscillator is half of that for the Macfarlane oscillator. The <it>c</it>-deformed oscillator of the Macfarlane type has propagating solutions in addition to localized ones. Reinvestigation of the <it>q</it>-deformed oscillator carried out in the light of these findings for the <it>c</it>-deformed systems proves that the <it>q</it>-deformed systems are invariant under the same translation symmetries as the <it>c</it>-deformed systems and have propagating waves of the Bloch type.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/4/819
http://dx.doi.org/10.1143/PTP.110.819
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Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/8412015-05-20HighWireOUPptp:110:4
Derivation of the Linearity Principle of Intriligator-Leigh-Seiberg
Tachikawa, Yuji
Letters
Utilizing the techniques recently developed for <it>N</it>=1 super Yang-Mills theories by Dijkgraaf, Vafa and collaborators, we derive the linearity principle of Intriligator, Leigh and Seiberg, for the confinement phase of theories with semi-simple gauge groups and matter fields in a non-chiral representation that satisfies a further technical assumption.
Oxford University Press
2003-10-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/4/841
http://dx.doi.org/10.1143/PTP.110.841
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Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/4/8472015-05-20HighWireOUPptp:110:4
Formation of Nuclear "Pasta" in Cold Neutron Star Matter
Iida, Kei
Watanabe, Gentaro
Sato, Katsuhiko
Errata
Oxford University Press
2003-10-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/4/847
http://dx.doi.org/10.1143/PTP.110.847
en
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oai:open-archive.highwire.org:ptp:110/5/10032015-05-20HighWireOUPptp:110:5
Discrete Symmetries in Lorentz-Invariant Non-Commutative QED
Morita, Katsusada
Articles
It is pointed out that the usual θ-algebra assumed for non-commuting coordinates is not <it>P</it>- and <it>T</it>-invariant unless one <it>formally</it> transforms the non-commutativity parameter θμν in an appropriate way. By contrast, the Lorentz-covariant DFR algebra, which ‘relativitizes’ the θ-algebra by replacing θμν with a second-rank antisymmetric tensor operator <f><inline-fig> <link locator="110-5-1003-eq001"></inline-fig></f>, is <it>P</it>- and <it>T</it>-invariant. It is then proved that <it>C</it>, <it>P</it> and <it>T</it> are separately conserved in Lorentz-invariant non-commutative QED.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/1003
http://dx.doi.org/10.1143/PTP.110.1003
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/10212015-05-20HighWireOUPptp:110:5
Strings in a PP-Wave Background Compactified on T8 with Twisted S1
Ideguchi, Kota
Imamura, Yosuke
Articles
We study a torus-like compactification of a type IIB maximally supersymmetric PP-wave background. As the most general case, we analyze a M<b><it>T</it></b>8 compactification of all the transverse directions. A nontrivial structure of the isometry group requires an additional light-like compactification. This additional <b><it>S</it></b>1 fiber is twisted on <b><it>T</it></b>8. We determine the spectrum of closed strings in this twisted torus background and compute the thermal partition function.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/1021
http://dx.doi.org/10.1143/PTP.110.1021
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oai:open-archive.highwire.org:ptp:110/5/10372015-05-20HighWireOUPptp:110:5
A Comment on the New Formulation of a Many-Level Shell Model
Yasumoto, Seiichi
Shimizu, Yoshifumi R.
Takada, Kenjiro
Letters
In order to construct a set of orthonormalized basis vectors in a many-level shell model space, we introduced a new type of CFP in a previous paper [K. Takada, M. Sato and S. Yasumoto, Prog. Theor. Phys. <b>104</b> (2000), 173]. There, we also presented one of its analytic representations. In this paper, we improve that representation by making it much simpler and applicable to the case of the five-level. Using this improved representation, it is possible to develop a general-use computer program for the shell-model calculation.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/1037
http://dx.doi.org/10.1143/PTP.110.1037
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/10432015-05-20HighWireOUPptp:110:5
Tip Oscillation of Dendritic Patterns in a Phase Field Model. II
Sakaguchi, Hidetsugu
Tokunaga, Seiji
Addenda
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/1043
http://dx.doi.org/10.1143/PTP.110.1043
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/8492015-05-20HighWireOUPptp:110:5
Logarithmic Scaling in the Stationary-Nonstationary Chaos Transition
Akimoto, Takuma
Aizawa, Yoji
Articles
Statistical features of the transition process from stationary to nonstationary chaos are studied using modified Bernoulli maps. The stationary-nonstationary chaos transition process can be generated by varying the value of the parameter that controls the intensity of the intermittency. The measure-theoretical structures of the chaos transition process are significantly different from the time-independent case, and new statistical phenomena appear, even when the value of the system parameter is changed continuously in time. The temporal behavior of the transition process is generally separated into three characteristic phases. The first phase appears in the initial stage of the transition, and the third one in the last stage, where the transition is almost finished, but the most interesting phase is the second one, which continues for long period. The entire transition process is analyzed using the renewal function, which describes the temporal behavior of the mean accumulated number of intermittent jumps. The logarithmic scaling relation appearing in the second phase is studied in detail with finite-range statistics. Finally, the statistical laws of the stationary-nonstationary chaos transition are discussed from the viewpoint of the modeling of seismological phenomena, and it is shown that seismological data are accounted for quite well by a metaphor model in terms of the stationary-nonstationary chaos transition.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/849
http://dx.doi.org/10.1143/PTP.110.849
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/8612015-05-20HighWireOUPptp:110:5
Topological Entropy in a Forced Duffing System
Yamaguchi, Yoshihiro
Tanikawa, Kiyotaka
Articles
A dynamical order relation is derived for the periodic orbits appearing through saddle-node bifurcations in the forced Duffing system of equations without friction. A lower bound for the topological entropy in this system is evaluated by forming braids from periodic orbits. In the so-called stochastic layer, there exist infinitely many types of chaotic motion with different complexities.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/861
http://dx.doi.org/10.1143/PTP.110.861
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/8752015-05-20HighWireOUPptp:110:5
Crossover between Anomalous Superdiffusion and Normal Diffusion in Oscillating Convection Flows
Ito, Kei
Miyazaki, Syuji
Articles
Anomalous diffusion found in fluid systems is studied. Diffusion constants and mean square displacements are analytically obtained on the basis of the continuous-time random walk (CTRW) velocity model, and the values are compared with those obtained from model simulations employing dissipative dynamics describing oscillating convection flows. Good agreement is obtained.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/875
http://dx.doi.org/10.1143/PTP.110.875
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/8892015-05-20HighWireOUPptp:110:5
Directionally Independent Energy Gap Formation Due to the Hyperfine Interaction
Miyashita, Seiji
Raedt, Hans De
Michielsen, Kristel
Articles
We study energy gap formation at the level-crossing point due to the hyperfine interaction. In contrast to the energy gap induced by the Dzyaloshinskii-Moriya interaction, the gap induced by the hyperfine interaction is independent of the direction of the magnetic field. We also study the dynamics of the magnetization under a time dependent field that changes at a constant rate.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/889
http://dx.doi.org/10.1143/PTP.110.889
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9012015-05-20HighWireOUPptp:110:5
Stability of Higher-Dimensional Schwarzschild Black Holes
Ishibashi, Akihiro
Kodama, Hideo
Articles
We investigate the classical stability of higher-dimensional Schwarzschild black holes with respect to linear perturbations in the framework of a gauge-invariant formalism for gravitational perturbations of maximally symmetric black holes. This formalism was recently developed by the present authors. The perturbations are classified into three types, those of tensor, vector and scalar modes, according to their tensorial behaviour on the spherical section of the background metric. The vector- and scalar-type modes correspond, respectively, to the axial and polar modes in the four-dimensional case. We show that for each mode of the perturbations, the spatial derivative part of the master equation is a positive, self-adjoint operator in the <it>L</it>2-Hilbert space, and hence that the master equation for each type of perturbation has no normalisable negative modes that would correspond to unstable solutions. In the same Schwarzschild background, we also analyse static perturbations of the scalar mode and show that there exists no static perturbation that is regular everywhere outside the event horizon and is well behaved at the spatial infinity. This confirms the uniqueness of the higher-dimensional spherically symmetric, static vacuum black hole, within the perturbation framework. Our strategy for treating the stability problem is also applicable to other higher-dimensional maximally symmetric black holes with a non-vanishing cosmological constant. We show that all possible types of maximally symmetric black holes (including the higher-dimensional Schwarzschild-de Sitter and Schwarzschild-anti-de Sitter black holes) are stable with respect to tensor and vector perturbations.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/901
http://dx.doi.org/10.1143/PTP.110.901
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9212015-05-20HighWireOUPptp:110:5
Relativistic Mean Field Theory for Deformed Nuclei with Pairing Correlations
Geng, Lisheng
Toki, Hiroshi
Sugimoto, Satoru
Meng, Jie
Articles
We develop a relativistic mean field (RMF) description of deformed nuclei with pairing correlations in the BCS approximation. The treatment of the pairing correlations for nuclei whose Fermi surfaces are close to the threshold of unbound states needs special attention. With this in mind, we use a delta function interaction for the pairing interaction to pick up those states whose wave functions are concentrated in the nuclear region and employ the standard BCS approximation for the single-particle states obtained from the RMF theory with deformation. We apply the RMF + BCS method to the Zr isotopes and obtain a good description of the binding energies and the nuclear radii of nuclei from the proton drip line to the neutron drip line.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/921
http://dx.doi.org/10.1143/PTP.110.921
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9372015-05-20HighWireOUPptp:110:5
Color Superconductivity in the Schwinger-Dyson Approach: Strange Quark Mass and the Color-Flavor Unlocking Line
Abuki, Hiroaki
Articles
Phase structure and phase transitions in dense QCD are studied using the Schwinger-Dyson (SD) method in the improved ladder approximation. We construct the Cornwall-Jackiw-Tomboulis (CJT) effective potentials at finite temperature for two types of pairing ansatz, namely the color-flavor locking (CFL) state and the two-flavor superconducting (2SC) state. Strong coupling effects at low densities, such as the off-Fermi surface and the antiquark contribution to the pairing gap due to the large effective coupling, cause the gap, critical temperature and their ratio to deviate from the weak coupling values. Nevertheless, the ratio of the physical quantity for the CFL state and that for the 2SC state does not differ so much from the weak coupling value, as long as the pairing interaction is taken to be the same for both cases. As a consequence, the CFL state always dominates the 2SC state and the critical temperatures of the transitions to the quark-gluon plasma (QGP) phase from both states coincide in the chiral limit. The energy gain in the CFL state relative to the 2SC state becomes smaller as the critical line dividing (μ, <it>T</it>) plane into the QGP and CFL phases is approached, and thus small perturbations can lift the degeneracy of these critical lines. As one of the perturbations, the effect of the strange quark mass <it>m</it><inf><it>s</it></inf> on the quark-pairing is examined. In particular, using a simple kinematical criterion, we discuss the behavior of the ‘ <it>color-flavor unlocking line</it>’, on which the CFL phase turns into the 2SC phase, through the variation of <it>m</it><inf><it>s</it></inf>.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/937
http://dx.doi.org/10.1143/PTP.110.937
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9632015-05-20HighWireOUPptp:110:5
Initial State Parton Evolution beyond the Leading Logarithmic Order of QCD
Tanaka, Hidekazu
Articles
A Monte-Carlo model based on the evolution of momentum distributions proposed in a previous work is extended to the next-to-leading logarithmic (NLL) order of quantum chromodynamics (QCD). Scaling violation of initial state parton distributions are generated using parton showers to accuracy of the NLL order by using the information from only splitting functions and initial parton distributions at some fixed low energy. Interference contributions due to the NLL order terms are taken into account for the generation of the transverse momenta in initial state parton radiations.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/963
http://dx.doi.org/10.1143/PTP.110.963
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9752015-05-20HighWireOUPptp:110:5
Noncommutative Phase Space and the Hall Effect
Kokado, Akira
Okamura, Takashi
Saito, Takesi
Articles
In order to investigate whether phase space coordinates are intrinsically noncommutative, we make use of the Hall effect. A minimally gauge-invariant coupling of an electromagnetic field is introduced, following the Faddeev-Jackiw formulation for constrained and unconstrained systems. We find that noncommutativity parameters in phase space yield an important contribution to the Hall conductivity.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
text/html
http://ptp.oxfordjournals.org/cgi/content/short/110/5/975
http://dx.doi.org/10.1143/PTP.110.975
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:ptp:110/5/9892015-05-20HighWireOUPptp:110:5
Lorentz Invariance and the Unitarity Problem in Non-Commutative Field Theory
Morita, Katsusada
Okumura, Yoshitaka
Umezawa, Eizou
Articles
It is shown that the one-loop two-point amplitude in <it>Lorentz-invariant</it> non-commutative (NC) ϕ3 theory is finite after subtraction in the commutative limit and satisfies the usual cutting rule. This eliminates the unitarity problem in Lorentz-non-invariant NC field theory in the approximation considered.
Oxford University Press
2003-11-01 00:00:00.0
TEXT
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http://ptp.oxfordjournals.org/cgi/content/short/110/5/989
http://dx.doi.org/10.1143/PTP.110.989
en
Copyright (C) 2003, The Physical Society of Japan
oai:open-archive.highwire.org:jis:9/1/12015-05-20HighWireOUPjis:9:1
Oviposition, development and survivorship of the sweetpotato whitefly Bemisia tabaci on soybean, Glycine max, and the garden bean, Phaseolus vulgaris
Mansaray, Augustine
Sundufu, Abu James
Papers
Oviposition, development and survivorship of <it>Bemisia tabaci</it> (Gennadius) (Hemiptera: Aleyrodidae) were evaluated on soybean and garden bean under laboratory conditions of 26.0 ± 0.5 oC, 70 – 80% RH and a photoperiod of 14:10 (L:D). <it>B. tabaci</it> deposited more eggs and survivorship of nymphs was significantly greater in a choice-test on soybean, <it>Glycine max</it> L. (Merr.) (Fabeles: Fabaceae), compared to the garden bean, <it>Phaseolus vulgaris</it> L. Overall developmental time from egg to adult eclosion was longer on garden bean than on soybean. Also, <it>B. tabaci</it> was more fecund and long-lived on soybean compared to garden bean. Demographic parameters calculated from life tables on the two bean species indicate that soybean is a better host plant for <it>B. tabaci</it> than garden bean.
Oxford University Press
2009-01-01 00:00:00.0
TEXT
text/html
http://jinsectscience.oxfordjournals.org/cgi/content/short/9/1/1
http://dx.doi.org/10.1673/031.009.0101
en
Copyright (C) 2009, Oxford University Press
oai:open-archive.highwire.org:jis:9/1/102015-05-20HighWireOUPjis:9:1
Seasonal patterns of the insect community structure in urban rain pools of temperate Argentina
Fontanarrosa, M. Soledad
Collantes, Marta B.
Bachmann, Axel O.
Papers
Temporary aquatic environments are widespread in the world, and although there are considerable regional differences in their type and method of formation they have many physical, chemical and biological properties in common. With the aim to increase knowledge of urban temporary pool fauna, the objectives of this work were to assess the seasonal patterns of species composition, richness, and diversity of the aquatic insect community inhabiting rain pools in urban temperate Argentina, and to identify the environmental variables associated to these patterns. Four temporary pools of an urban green space in Buenos Aires City were studied throughout a 1-year period. Eleven flood cycles with very varied hydroperiods and dry periods, mainly associated with rainfall, were identified. Insect species richness in these temporary urban pools, 86 taxa were documented, was found to be within the range reported for wild temporary water bodies of other regions of the world. The present results provide evidence for the existence of a clear link between habitat and community variability. Hydroperiod and seasonality were the main environmental factors involved in structuring the insect communities of the studied water bodies. Urban pools in green spaces have the potential to act to its dwellers like corridors through the urban matrix. Taking into account these characteristics and their accessibility, urban temporary pools can be considered as promising habitats for the study of ecological processes involving the insect community.
Oxford University Press
2009-01-01 00:00:00.0
TEXT
text/html
http://jinsectscience.oxfordjournals.org/cgi/content/short/9/1/10
http://dx.doi.org/10.1673/031.009.1001
en
Copyright (C) 2009, Oxford University Press
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