Abstract
We use SU(3) anisotropic lattice QCD at quenched level to study the 0 ++ glueball correlator 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 for the appropriate fit-function for the lattice data obtained with 5,500–9,900 gauge configurations at each T. The results show the significant thermal width broadening as Γ(T c ) ∼ 300 MeV with a reduction in the peak center asΔω 0( T c ) ∼ 100 MeV near the critical temperature T c .
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