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arXiv · 1212.2241

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

C. A. Dominguez·M. Loewe·Y. Zhang
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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.

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C. A. Dominguez, M. Loewe, Y. Zhang. 2012-12-10. The $a_1(1260)$ meson and chiral symmetry restoration and deconfinment at finite temperature QCD. https://doi.org/10.1016/j.nuclphysbps.2012.12.037

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