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Title: Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential

Abstract

With the aim of setting constraints for the modeling of the QCD phase diagram, the phase structure of the two-flavor Polyakov-loop-extended Nambu and Jona-Lasinio (PNJL) model is investigated in the range of imaginary chemical potentials ({mu}{sub I}) and compared with available N{sub f} = 2 lattice QCD results. The calculations are performed using the advanced nonlocal version of the PNJL model with the inclusion of vector-type quasiparticle interactions between quarks, and with wave-function-renormalization corrections. It is demonstrated that the nonlocal PNJL model reproduces important features of QCD at finite {mu}{sub I}, such as the Roberge-Weiss (RW) periodicity and the RW transition. Chiral and deconfinement transition temperatures for N{sub f} = 2 turn out to coincide both at zero chemical potential and at finite {mu}{sub I}. Detailed studies are performed concerning the RW endpoint and its neighborhood where a first-order transition occurs.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) Riken BNL Research Center
Sponsoring Org.:
RIKEN
OSTI Identifier:
1043349
Report Number(s):
BNL-96600-2011-JA
Journal ID: ISSN 1550-7998; TRN: US1203107
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 84; Journal Issue: 5; Journal ID: ISSN 1550-7998
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; PERIODICITY; PHASE DIAGRAMS; QUANTUM CHROMODYNAMICS; QUARKS; SIMULATION; TRANSITION TEMPERATURE; nonlocal polyakov nambu jona lasinio; riken bnl research center

Citation Formats

Kashiwa K., Hell, T., and Weise, W. Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential. United States: N. p., 2011. Web. doi:10.1103/PhysRevD.84.056010.
Kashiwa K., Hell, T., & Weise, W. Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential. United States. doi:10.1103/PhysRevD.84.056010.
Kashiwa K., Hell, T., and Weise, W. Wed . "Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential". United States. doi:10.1103/PhysRevD.84.056010.
@article{osti_1043349,
title = {Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential},
author = {Kashiwa K. and Hell, T. and Weise, W.},
abstractNote = {With the aim of setting constraints for the modeling of the QCD phase diagram, the phase structure of the two-flavor Polyakov-loop-extended Nambu and Jona-Lasinio (PNJL) model is investigated in the range of imaginary chemical potentials ({mu}{sub I}) and compared with available N{sub f} = 2 lattice QCD results. The calculations are performed using the advanced nonlocal version of the PNJL model with the inclusion of vector-type quasiparticle interactions between quarks, and with wave-function-renormalization corrections. It is demonstrated that the nonlocal PNJL model reproduces important features of QCD at finite {mu}{sub I}, such as the Roberge-Weiss (RW) periodicity and the RW transition. Chiral and deconfinement transition temperatures for N{sub f} = 2 turn out to coincide both at zero chemical potential and at finite {mu}{sub I}. Detailed studies are performed concerning the RW endpoint and its neighborhood where a first-order transition occurs.},
doi = {10.1103/PhysRevD.84.056010},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 5,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}