title: Fate of vector dominance in effective field theory.
abstract: We reveal the full phase structure of the effective field theory for QCD, based on hidden local symmetry (HLS) through the one-loop renormalization group equation including quadratic divergences. We then show that vector dominance (VD) is not a sacred discipline of the effective field theory but rather an accidental phenomenon peculiar to three-flavored QCD. In particular, the chiral symmetry restoration in the HLS model takes place in a wide phase boundary surface, on which the VD is nowhere realized. This suggests that VD may not be valid for chiral symmetry restoration in hot and/or dense QCD.
authors.affiliation: Department of Physics, Nagoya University, Nagoya, 464-8602, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Harada
authors.forename: K
authors.initials: K
authors.lastname: Yamawaki