Chiral Lagrangian Treatment of 0++ Mesons and 0++Glueballs

Abstract

Within the framework of a nonlinear chiral Lagrangian the mass spectraand the decay properties of 0++ states below 2 GeV are studied.Assuming that f0(980), a0(980), K*0(1430), andf0(1500) comprise an SU(3) nonet, we make a detailed predictionabout the static properties of the 0++ mesons. The substructureanalysis of these states in terms of two- and four-quark components aswell as a glueball component is carried out. We also consider theinteraction Lagrangian and provide a preliminary study of the strong andradiative decays of the 0++ mesons. The scalar glueball masses andpartial widths are also presented. In view of the fact that few data of 0++mesons are clearly given in the present PDG (Particle Data Group) list and that thefour-quark content of mesons is a hot issue both experimentally andtheoretically, the predicted results of the paper may be helpful forupcoming experimental and theoretical studies of these mesons.