Scalar Glueball Mass Reduction at Finite Temperature in SU(3) Anisotropic Lattice QCD

TL;DR

This study investigates how the scalar glueball mass decreases at finite temperatures below the critical temperature T_c using anisotropic lattice QCD, revealing a significant 20% reduction near T_c.

Contribution

First lattice QCD analysis of scalar glueball mass behavior at finite temperature with detailed anisotropic lattice setup and correlation analysis.

Findings

Approximately 20% mass reduction of scalar glueball near T_c.

Scalar glueball mass decreases from about 1500-1700 MeV to 1250 ± 50 MeV.

Mass reduction observed in the temperature range 0.8 T_c to T_c.

Abstract

We report the first study of the glueball properties at finite temperatures below T_c using SU(3) anisotropic lattice QCD with beta=6.25, the renormalized anisotropy xi \equiv a_s/a_t = 4 and 20^3 \times N_t (N_t=35,36,37,38,40,43,45,50,72) at the quenched level. From the temporal correlation analysis with the smearing method, about 20 % mass reduction is observed for the lowest scalar glueball as m_G(T)=1250 \pm 50MeV for 0.8 T_c < T < T_c in comparison with m_G \simeq 1500 \sim 1700MeV at T \simeq 0.