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Title: Probing deconfinement in a chiral effective model with Polyakov loop at imaginary chemical potential

Abstract

The phase structure of the two-flavor Polyakov-loop extended Nambu-Jona-Lashinio model is explored at finite temperature and imaginary chemical potential with a particular emphasis on the confinement-deconfinement transition. We point out that the confined phase is characterized by a cos3{mu}{sub I}/T dependence of the chiral condensate on the imaginary chemical potential while in the deconfined phase this dependence is given by cos{mu}{sub I}/T and accompanied by a cusp structure induced by the Z(3) transition. We demonstrate that the phase structure of the model strongly depends on the choice of the Polyakov loop potential U. Furthermore, we find that by changing the four fermion coupling constant G{sub s}, the location of the critical end point of the deconfinement transition can be moved into the real chemical potential region. We propose a new parameter characterizing the confinement-deconfinement transition.

Authors:
 [1];  [2]; ;  [1];  [3];  [4]
  1. GSI, Helmholzzentrum fuer Schwerionenforschung, Planckstr. 1, D-64291 Darmstadt (Germany)
  2. (Japan)
  3. Institute of Theoretical Physics, University of Wroclaw, PL-50204 Wroclaw (Poland)
  4. (Germany)
Publication Date:
OSTI Identifier:
21607837
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.84.076009; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRALITY; CONDENSATES; CONFINEMENT; COUPLING CONSTANTS; FERMIONS; FLAVOR MODEL; SIMULATION; COMPOSITE MODELS; MATHEMATICAL MODELS; PARTICLE MODELS; PARTICLE PROPERTIES; QUARK MODEL

Citation Formats

Morita, Kenji, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Skokov, Vladimir, Friman, Bengt, Redlich, Krzysztof, and Extreme Matter Institute EMMI, GSI, Planckstr. 1, D-64291 Darmstadt. Probing deconfinement in a chiral effective model with Polyakov loop at imaginary chemical potential. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.076009.
Morita, Kenji, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Skokov, Vladimir, Friman, Bengt, Redlich, Krzysztof, & Extreme Matter Institute EMMI, GSI, Planckstr. 1, D-64291 Darmstadt. Probing deconfinement in a chiral effective model with Polyakov loop at imaginary chemical potential. United States. doi:10.1103/PHYSREVD.84.076009.
Morita, Kenji, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Skokov, Vladimir, Friman, Bengt, Redlich, Krzysztof, and Extreme Matter Institute EMMI, GSI, Planckstr. 1, D-64291 Darmstadt. Sat . "Probing deconfinement in a chiral effective model with Polyakov loop at imaginary chemical potential". United States. doi:10.1103/PHYSREVD.84.076009.
@article{osti_21607837,
title = {Probing deconfinement in a chiral effective model with Polyakov loop at imaginary chemical potential},
author = {Morita, Kenji and Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 and Skokov, Vladimir and Friman, Bengt and Redlich, Krzysztof and Extreme Matter Institute EMMI, GSI, Planckstr. 1, D-64291 Darmstadt},
abstractNote = {The phase structure of the two-flavor Polyakov-loop extended Nambu-Jona-Lashinio model is explored at finite temperature and imaginary chemical potential with a particular emphasis on the confinement-deconfinement transition. We point out that the confined phase is characterized by a cos3{mu}{sub I}/T dependence of the chiral condensate on the imaginary chemical potential while in the deconfined phase this dependence is given by cos{mu}{sub I}/T and accompanied by a cusp structure induced by the Z(3) transition. We demonstrate that the phase structure of the model strongly depends on the choice of the Polyakov loop potential U. Furthermore, we find that by changing the four fermion coupling constant G{sub s}, the location of the critical end point of the deconfinement transition can be moved into the real chemical potential region. We propose a new parameter characterizing the confinement-deconfinement transition.},
doi = {10.1103/PHYSREVD.84.076009},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}