Narrow width of a glueball decay into two mesons
Narrow width of a glueball decay into two mesons
The widths of a glueball decay to two pions or kaons are analyzed in the perturbative QCD (PQCD) framework. Our results show that the glueball ground state has a small branching ratio for the two-meson decay mode, which is around ${10}^{\ensuremath{-}2}$. The predicted values are consistent with the data of …