Thermal properties of $D_2^*(2460)$ and $D_{s2}^*(2573)$ tensor mesons using QCD sum rules

TL;DR

This study uses thermal QCD sum rules to analyze how the masses and decay constants of heavy-light tensor mesons $D_2^*(2460)$ and $D_{s2}^*(2573)$ decrease significantly near the critical temperature, indicating thermal effects on meson properties.

Contribution

It provides the first detailed calculation of the temperature dependence of these tensor mesons' properties using thermal QCD sum rules, including the effects of additional operators at finite temperature.

Findings

Masses decrease by about 39% and 37% near the critical temperature.

Decay constants reduce to roughly 25% of their vacuum values.

Thermal effects significantly alter meson properties close to the phase transition.

Abstract

We investigate the masses and decay constants of the heavy-light $D_2^*(2460)$ and $D_{s2}^*(2573)$ tensor mesons in the framework of thermal QCD sum rules. Taking into account the additional operators arising at finite temperature, we evaluate the Wilson expansion for the two-point correlation function associated with these mesons. We observe that the values of the masses and decay constants decrease considerably at near to the critical temperature. The decay constants attain roughly to $25\%$ of their values in vacuum, while the masses decrease about $39\%$ and $37\%$ in $D_2^*$ and $D_{s2}^*$ channels, respectively.