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Title: Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop

Abstract

We study the finite temperature behavior of light scalar and pseudoscalar meson properties in the context of a three-flavor nonlocal chiral quark model. The model includes mixing with active strangeness degrees of freedom, and takes care of the effect of gauge interactions by coupling the quarks with the Polyakov loop. We analyze the chiral restoration and deconfinement transitions, as well as the temperature dependence of meson masses, mixing angles and decay constants. The critical temperature is found to be T{sub c{approx_equal}}202 MeV, in better agreement with lattice results than the value recently obtained in the local SU(3) PNJL model. It is seen that above T{sub c} pseudoscalar meson masses get increased, becoming degenerate with the masses of their chiral partners. The temperatures at which this matching occurs depend on the strange quark composition of the corresponding mesons. The topological susceptibility shows a sharp decrease after the chiral transition, signalling the vanishing of the U(1){sub A} anomaly for large temperatures.

Authors:
 [1];  [2];  [3];  [4];  [1];  [2];  [5]
  1. Physics Department, Comision Nacional de Energia Atomica, Av.Libertador 8250, (1429) Buenos Aires (Argentina)
  2. (Argentina)
  3. CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina)
  4. (1900) La Plata (Argentina)
  5. (1078) Buenos Aires (Argentina)
Publication Date:
OSTI Identifier:
21409839
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 81; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.81.054005; (c) 2010 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRALITY; COUPLING; DEGREES OF FREEDOM; FLAVOR MODEL; GAUGE INVARIANCE; INTERACTIONS; MASS; MEV RANGE 100-1000; PSEUDOSCALAR MESONS; QUARK MODEL; S QUARKS; STRANGENESS; SU-3 GROUPS; TEMPERATURE DEPENDENCE; TOPOLOGY; U-1 GROUPS; WEINBERG ANGLE; BOSONS; COMPOSITE MODELS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRONS; INVARIANCE PRINCIPLES; LIE GROUPS; MATHEMATICAL MODELS; MATHEMATICS; MESONS; MEV RANGE; PARTICLE MODELS; PARTICLE PROPERTIES; QUARKS; STRANGE PARTICLES; SU GROUPS; SYMMETRY GROUPS; U GROUPS

Citation Formats

Contrera, G. A., CONICET, Rivadavia 1917, 1033 Buenos Aires, Dumm, D. Gomez, IFLP, Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67,, Scoccola, Norberto N., CONICET, Rivadavia 1917, 1033 Buenos Aires, and Universidad Favaloro, Solis 453,. Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.054005.
Contrera, G. A., CONICET, Rivadavia 1917, 1033 Buenos Aires, Dumm, D. Gomez, IFLP, Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67,, Scoccola, Norberto N., CONICET, Rivadavia 1917, 1033 Buenos Aires, & Universidad Favaloro, Solis 453,. Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop. United States. doi:10.1103/PHYSREVD.81.054005.
Contrera, G. A., CONICET, Rivadavia 1917, 1033 Buenos Aires, Dumm, D. Gomez, IFLP, Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67,, Scoccola, Norberto N., CONICET, Rivadavia 1917, 1033 Buenos Aires, and Universidad Favaloro, Solis 453,. Mon . "Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop". United States. doi:10.1103/PHYSREVD.81.054005.
@article{osti_21409839,
title = {Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop},
author = {Contrera, G. A. and CONICET, Rivadavia 1917, 1033 Buenos Aires and Dumm, D. Gomez and IFLP, Dpto. de Fisica, Universidad Nacional de La Plata, C.C. 67, and Scoccola, Norberto N. and CONICET, Rivadavia 1917, 1033 Buenos Aires and Universidad Favaloro, Solis 453,},
abstractNote = {We study the finite temperature behavior of light scalar and pseudoscalar meson properties in the context of a three-flavor nonlocal chiral quark model. The model includes mixing with active strangeness degrees of freedom, and takes care of the effect of gauge interactions by coupling the quarks with the Polyakov loop. We analyze the chiral restoration and deconfinement transitions, as well as the temperature dependence of meson masses, mixing angles and decay constants. The critical temperature is found to be T{sub c{approx_equal}}202 MeV, in better agreement with lattice results than the value recently obtained in the local SU(3) PNJL model. It is seen that above T{sub c} pseudoscalar meson masses get increased, becoming degenerate with the masses of their chiral partners. The temperatures at which this matching occurs depend on the strange quark composition of the corresponding mesons. The topological susceptibility shows a sharp decrease after the chiral transition, signalling the vanishing of the U(1){sub A} anomaly for large temperatures.},
doi = {10.1103/PHYSREVD.81.054005},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 81,
place = {United States},
year = {Mon Mar 01 00:00:00 EST 2010},
month = {Mon Mar 01 00:00:00 EST 2010}
}