Mesonic Width Effects on the Momentum Dependence of the Rho-Omega Mixing Matrix Element

Abstract

It is shown, in a model independent way, that the large difference in rho and omega widths gives rise to a new source of momentum dependence for the rho-omega mixing matrix element. The q^2 dependence arising due to the meson widths leads to a significant alteration of the result obtained in the zero-width approximation usually discussed in the literature. The origin of this strong momentum dependence lies in the difference between the rho and omega meson widths.

Comments: 9 pages. An additional figure illustrating the effect of a momentum dependent rho-meson width is included. This and related papers may also be obtained from http://www.phys.washington.edu/~derek/Publications.html