Is theρMeson a Dynamical Gauge Boson of Hidden Local Symmetry?

Abstract

We suggest that the $\rho$ meson is a dynamical gauge boson of a hidden local symmetry in the non-linear chiral Lagrangian. The origin of the $\rho$-meson mass is understood as the Higgs mechanism of the hidden local symmetry. The low-energy dynamics of $\rho$, $\pi$, and matter fields, including the Kawarabayashi-Suzuki-Riazuddin-Fayyazuddin relation and $\rho$-coupling universality, is consistently described in this new framework. The electromagnetic interaction can be introduced in a unique manner, which gives a successful explanation of $\rho$ dominance of the photon coupling.