1998/07/31 by M. Benayoun, H.B. O’Connell, H. B. O'Connell +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.59.074020
published as Phys.Rev.D59:074020,1999 · 18 pages, REVTEX
arxiv created 1999/03/05 · openalex publication_date 1999/03/08 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We discuss the properties of vector mesons, in particular the \ensuremathρ0, in the context of the hidden local symmetry (HLS) model. This provides a unified framework to study several aspects of the low energy QCD sector. First, we show that in the HLS model the physical photon is massless, without requiring off field diagonalization. We then demonstrate the equivalence of HLS and the two existing representations of vector meson dominance, VMD1 and VMD2, at both the tree level and one loop order. Finally the S matrix pole position is shown to provide a model and process independent means of specifying the \ensuremathρ mass and width, in contrast with the real axis prescription currently used in the Particle Data Group tables.