Leptonic Decay Constants of $D_{s}$ and $B_{s}$ Mesons at Finite Temperature

TL;DR

This paper studies how the masses and leptonic decay constants of $D_{s}$ and $B_{s}$ mesons change with temperature using thermal QCD sum rules, providing insights into meson behavior in hot environments.

Contribution

It applies thermal QCD sum rules with vacuum subtraction to analyze temperature effects on meson parameters, a novel approach for these specific mesons.

Findings

Masses decrease with increasing temperature.

Leptonic decay constants decrease as temperature rises.

Results enhance understanding of meson properties in hot QCD matter.

Abstract

In the present work, $D_{s}$ and $B_{s}$ meson parameters are investigated in the framework of thermal QCD sum rules. The temperature dependence of the mass and the leptonic decay constants are investigated by using Borel transform sum rules and Hilbert moment sum rules. To increase sensitivity, the vacuum contributions are subtracted from thermal expressions and the temperature dependences of the leptonic decay constants and meson masses are studied.