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Titolo:
Chiral phase transition within effective models with constituent quarks - art. no. 045202
Autore:
Scavenius, O; Mocsy, A; Mishustin, IN; Rischke, DH;
Indirizzi:
Niels Bohr Inst, DK-2100 Copenhagen O, Denmark Niels Bohr Inst Copenhagen Denmark O Inst, DK-2100 Copenhagen O, Denmark Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 Astron, Minneapolis, MN 55455 USA Russian Res Ctr, Kurchatov Inst, RU-123182 Moscow, Russia Russian Res CtrMoscow Russia RU-123182 v Inst, RU-123182 Moscow, Russia Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-60054 hys, D-60054 Frankfurt, Germany Brookhaven Natl Lab, RIKEN, BNL, Res Ctr, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA 11973 BNL, Res Ctr, Upton, NY 11973 USA
Titolo Testata:
PHYSICAL REVIEW C
fascicolo: 4, volume: 6404, anno: 2001,
pagine: 5202 -
SICI:
0556-2813(200110)6404:4<5202:CPTWEM>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
JONA-LASINIO MODEL; FINITE BARYON DENSITY; GLUON PLASMA; NAMBU; QCD; CHROMODYNAMICS; TEMPERATURE; DIAGRAM; MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Scavenius, O Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark Niels Bohr Inst Blegdamsvej 17 Copenhagen Denmark O Denmark
Citazione:
O. Scavenius et al., "Chiral phase transition within effective models with constituent quarks - art. no. 045202", PHYS REV C, 6404(4), 2001, pp. 5202

Abstract

We study the chiral phase transition at nonzero temperature T and baryon chemical potential mu (B) within the framework of the linear sigma model andthe Nambu-Jona-Lasinio (NJL) model. For small bare quark masses we find inboth models a smooth crossover transition for nonzero T and mu (B) = 0 anda first order transition for T = 0 and nonzero mu (B). We calculate explicitly the first order phase transition line and spinodal lines in the (T, mu(B)) plane. As expected they all end at a critical point. We find that, inthe linear sigma model, the sigma mass goes to zero at the critical point. This is in contrast to the NJL model, where the sigma mass, as defined in the random phase approximation, does not vanish. We also compute the adiabatic lines in the (T,mu (B)) plane. Within the models studied here, the critical point does not serve as a "focusing" point in the adiabatic expansion.

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Documento generato il 03/07/20 alle ore 01:50:39