Glueball-quarkonia content and decay of scalar-isoscalar mesons - art. no.054010

We investigate the hadronic two-body decay modes of the scalar-isoscalar f( 0)(1370), f(0)(1500) and f(0)(1710) states as resulting from the mixture of the lowest lying scalar glueball with the isoscalar states of the ground s tate P-3(0) Q (Q) over bar nonet. In the decay analysis we take into accoun t the direct coupling of the quarkonia and glueball components of the f(0) states to the quarkonia components of the two-meson final state with the de cay dynamics inspired by the strong coupling limit of QCD. We calculate par tial decay widths for the f(0) states in the proposed three-state mixing sc hemes and discuss their compatibility with the observed decay features. Fin ally, we determine the glueball-quarkonia content of the f(0) states from a detailed fit to experimental decay data of f(0)(1500) and give predictions for the partial decay widths of f(0)(1370) and f(0)(1710), providing thus a sensitive test of the proposed mixing scheme. [S0556-2821(99)01415-0].