Gluons in the lattice SU(2) classical field

Abstract

The SU(2) gluonic correlation functions, glueball effective masses in the $J^P=0^{+}$, $2^{+}$ and $0^{-}$ channels were calculated from the lattice classical gauge configurations which were obtained by smoothing the thermal gauge configurations through the improved cooling method. The instanton-induced attractive force in the $0^{+}$ channel and the repulsive force in the $0^{-}$ channel are confirmed in the Monte Carlo simulation. There is evidence that the instanton vacuum contribution to the $0^{+}$ glueball mass is significant.

Comments: LaTeX, 9 pages, Proceedings of the International Workshop on Nonperturbative Methods and Lattice QCD, Guangzhou, China