Thermal Width Broadening of the 0++ Glueball Spectrum near Tc

TL;DR

This study investigates how the 0++ glueball spectrum broadens and shifts near the critical temperature using lattice QCD, revealing significant thermal effects on the glueball's properties.

Contribution

It introduces a Breit-Wigner analysis of lattice QCD data to quantify thermal width broadening of the 0++ glueball near Tc, a novel approach in this context.

Findings

Thermal width broadening of approximately 300 MeV at Tc

Peak center reduction of about 100 MeV near Tc

Significant thermal effects on glueball spectral properties

Abstract

We study the 0++ glueball correlator constructed with SU(3) anisotropic quenched lattice QCD at various temperature taking into account the possible existence of the thermal width in the ground-state peak. For this purpose, we adopt the Breit-Wigner ansatz, analysing the lattice data obtained with 5,500-9,900 gauge configurations at each T. The results indicate the significant thermal width broadening as Gamma(Tc) \sim 300 MeV with a reduction in the peak center as Delta omega_0(Tc) \sim 100 MeV in the vicinity of the critical temperature Tc.