Universal Coupling of theωMeson and Regge Residues

Abstract

In this paper we consider some of the experimental data bearing on the hypothesis of universality of co coupling. The low-energy data on the coupling of the w meson and the high-energy data on the coupling of the co-type Regge trajectory have been considered. The data seem to support the universality hypothesis. The universal w coupling constant gj/^ir is estimated to be 4.96±1.24, which is higher than the universal p coupling constant ^py47r=2.60±0.68, where gp and g^ are so normalized that goi = gp in the SU(6) limit. To relate the Regge residues of vector trajectories to the universal coupling constant, we factor out the angular momentum dependence of the former and introduce a ''reduced" Regge residue and a scale parameter for each trajectory. The scale parameters for the co and the p trajectories turn out to be of the order of 290 and 186 MeV, respectively.