The $a_1(1260)$ meson and chiral symmetry restoration and deconfinment at finite temperature QCD

Abstract

We consider the light-quark axial-vector current correlator in the framework of thermal QCD sum rules to: (a) find a relation between chiral-symmetry restoration and deconfinement, and (b) determine the temperature behaviour of the $a_1(1260)$ width and coupling. Our results show that deconfinement takes place at a slightly lower temperature than chiral-symmetry restoration.This difference is not significant given the accuracy of the method. The behaviour of the $a_1(1260)$ parameters is consistent with quark-gluon deconfinement, since the width grows and the coupling decreases with increasing temperature.

Four pages, four figures. Contribution to QCD-2012, Montpellier, France

References in corpus (8)

• Equation of state and QCD transition at finite temperature
• Equation of State for physical quark masses
• Phase diagram and critical endpoint for strongly-interacting quarks
• Charmonium in the vector channel at finite temperature from QCD sum rules
• QCD phase diagram from finite energy sum rules
• Heavy-light quark pseudoscalar and vector mesons at finite temperature
• Chiral corrections to the $SU(2)\times SU(2)$ Gell-Mann-Oakes-Renner relation
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Cited by in corpus (1)

• Unified analysis of screening masses for vector and axial-vector mesons and their diquark partners in the Contact Interaction model