Thermal QCD Sum Rules for sigma(600) Meson
Elsen Veli Veliev, Takhmassib M. Aliev
TL;DR
This paper investigates how the properties of the sigma(600) scalar meson change with temperature using thermal QCD sum rules, including spectral density contributions and additional operators at finite temperature.
Contribution
It introduces a detailed thermal QCD sum rule analysis for sigma(600) meson, accounting for spectral density and temperature-dependent operators, providing new insights into meson behavior at finite temperature.
Findings
Mass of sigma(600) decreases with temperature
Leptonic decay constant diminishes as temperature rises
Spectral density includes both pole and two-pion continuum contributions
Abstract
In the present work, the temperature dependence of the scalar mesons parameters is investigated in the framework of thermal QCD sum rules. We calculate sigma-pole and the non-resonant two-pion continuum contributions to the spectral density. Taking into account additional operators appearing at finite temperature, the thermal QCD sum rules are derived. The temperature dependence of the shifts in the mass and leptonic decay constant of scalar sigma(600) meson is calculated.
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