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Titolo:
Chiral symmetry restoration at nonzero temperature in the SU(3)(r)XSU(3)(l) linear sigma model - art. no. 085008
Autore:
Lenaghan, JT; Rischke, DH; Schaffner-Bielich, J;
Indirizzi:
Yale Univ, Dept Phys, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 Univ, Dept Phys, New Haven, CT 06520 USA
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 8, volume: 6208, anno: 2000,
pagine: 5008 -
SICI:
0556-2821(20001015)6208:8<5008:CSRANT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
FINITE-TEMPERATURE; PHASE-TRANSITION; GAUGE-THEORIES; SCATTERING; FERMIONS; BREAKING; MESONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Lenaghan, JT Brookhaven Natl Lab, Dept Phys, RIKEN BNL Res Ctr, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA 11973 , Upton, NY 11973 USA
Citazione:
J.T. Lenaghan et al., "Chiral symmetry restoration at nonzero temperature in the SU(3)(r)XSU(3)(l) linear sigma model - art. no. 085008", PHYS REV D, 6208(8), 2000, pp. 5008

Abstract

We study patterns of chiral symmetry breaking at zero temperature and its subsequent restoration at nonzero temperature within the SU(3)(r) x SU(3)(l) linear sigma model. Gap equations for the masses of the scalar and pseudoscalar mesons and the non-strange and strange quark condensates are systematically derived in the Hartree approximation via the Cornwall-Jackiw-Tomboulis formalism. In the chiral limit, the chiral symmetry restoring transition is found to be first order, as predicted by universality arguments. Taking the experimental values for the meson masses, however, the transition is crossover. The absence of the U(1)(A) anomaly is found to drive this transition closer to being first order. At large temperatures, the mixing angles between octet and singlet states approach ideal flavor mixing.

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Documento generato il 04/07/20 alle ore 12:15:32