Gluons in the lattice SU(2) classical field
Abstract
The SU(2) gluonic correlation functions, glueball effective masses in the JP=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.
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