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

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.054005· OSTI ID:21409839

Contrera, G A ^[1]; Dumm, D Gomez ^[2]; Scoccola, Norberto N ^[1]

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1. Physics Department, Comision Nacional de Energia Atomica, Av.Libertador 8250, (1429) Buenos Aires (Argentina)
2. CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina)

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.

• OSTI ID: 21409839
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.054005; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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
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MATHEMATICS
MESONS
MEV RANGE
PARTICLE MODELS
PARTICLE PROPERTIES
QUARKS
STRANGE PARTICLES
SU GROUPS
SYMMETRY GROUPS
U GROUPS