Mesonic Excitations of QGP: Study with an Effective Model

TL;DR

This paper investigates mesonic excitations in quark-gluon plasma using a three-flavor PNJL model, revealing how different mesonic states behave above the chiral transition temperature.

Contribution

It provides a detailed analysis of mesonic spectral functions at finite temperature and chemical potential, highlighting the survival of certain resonances above the transition.

Findings

Resonance structures in the η channel persist above 

Kaonic states are washed out just above 

Spectral structures are sensitive to the anomaly term

Abstract

We study the correlations between quark-antiquark pairs in different quantum number channels in a deconfined plasma by using an effective model of QCD. Using the three flavour PNJL model, the finite temperature spectral functions for different mesonic states are studied at zero and nonzero quark chemical potentials. It is found that in the $\eta$ channel resonance structures survive above the chiral transition temperature $\tc$, while the kaonic states seem to get washed off just above $\tc$. The sensitivity of the structures to the anomaly term are carefully investigated.