Thermal Width Broadening of the 0++ Glueball Spectrum near Tc
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) 300 MeV with a reduction in the peak center as Delta omega0(Tc) 100 MeV in the vicinity of the critical temperature Tc.
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