Chiral symmetry breaking in hidden local symmetry

Summary

Chiral breaking for baryon and meson interaction is formulated in the framework of the hidden local symmetric theory of the non-linear sigma model on the manifoldU(3)_L×U(3)_R/U(3)_V. The chiral symmetry-breaking term transforms as (3,3^*) underU(3)_L×U(3)_R at the first order. Several low-energy theorems are derived for the electromagnetic interaction of baryon. The symmetry-breaking term preservesSU(2)×U(1) symmetry; we have confirmed that the Sakurai formula of the electromagnetic interaction of vector meson holds and directly shown that the photon mass vanishes. The fundamental gauge coupling constantg and the mixing angle θ of vector meson are fixed by independent phenomena of vector meson masses and eē decay of vector meson. Using these values ofg and θ, we extend our analysis to the nucleon form factor and indicate a breaking of the OZI rule and a sizable contents of s-quark pair in the nucleon.