Charmonium spectra at finite temperature from QCD sum rules with the maximum entropy method

TL;DR

This study employs QCD sum rules combined with the maximum entropy method to analyze charmonium spectral functions at finite temperature, revealing their dissolution near the deconfinement temperature.

Contribution

It introduces a novel approach that directly extracts spectral functions from QCD sum rules without assuming their shape, enhancing understanding of charmonium behavior at high temperatures.

Findings

J/psi and eta_c peaks diminish near T_c

Spectral functions show rapid dissolution above T_c

Method provides model-independent spectral analysis

Abstract

Charmonia spectral functions at finite temperature are studied using QCD sum rules in combination with the maximum entropy method. This approach enables us to directly obtain the spectral function from the sum rules, without having to introduce any specific assumption about its functional form. As a result, it is found that while J/psi and eta_c manifest themselves as significant peaks in the spectral function below the deconfinement temperature T_c, they quickly dissolve into the continuum and almost completely disappear at temperatures between 1.0 T_c and 1.1 T_c.