科研之友
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摘要
The coupled cluster method is improved with the random phase approximation (RPA) to calculate the glueball mass in the 2 1-D SU(2) lattice gauge theory. In this calculating, the trial wave function consists of single-hollow graphs, the Feymann-Hellman theorem is used to obtain a set of closed equations. When the calculation proceeds up to the sixth order, the calculated results of glueball mass show scaling window and a sign of converges at weak coupling region 1/g(2) > 1.0. The results of this paper indicate that the seventh order glueball mass will show good scaling behavior and the converges.
