Thermal behavior of the mass and residue of hyperons

TL;DR

This paper studies how the mass and residue of hyperons change with temperature using thermal QCD sum rules, revealing stability up to a certain point before decreasing as temperature rises.

Contribution

It introduces a thermal QCD sum rule approach to analyze hyperon properties at finite temperature, including the effects of additional operators.

Findings

Mass and residue remain stable up to a specific temperature.

They decrease as temperature increases beyond that point.

Temperature-dependent continuum thresholds are determined.

Abstract

We investigate the mass and residue of the $\Sigma$, $\Lambda$ and $\Xi$ hyperons at finite temperature in the framework of thermal QCD sum rules. In our calculation, we take into account the additional operators coming up at finite temperature. We find the temperature-dependent continuum threshold for each hyperon using the obtained sum rules for their mass and residue. The numerical results demonstrate that the mass and residue of the particles under consideration remain stable up to a certain temperature, after which they decrease by increasing the temperature.