Vector meson dominance and the {rho} meson

Journal Article · Thu Apr 01 00:00:00 EST 1999 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.59.074020· OSTI ID:322033

Benayoun, M ^[1]; OConnell, H B ^[2]; Williams, A G ^[3]

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1. LPNHE des Universites Paris VI et VII--IN2P3, Paris (France)
2. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
3. Department of Physics and Mathematical Physics and Special Research Centre for the Subatomic Structure of Matter, University of Adelaide 5005 (Australia)

We discuss the properties of vector mesons, in particular the {rho}{sup 0}, 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 {rho} mass and width, in contrast with the real axis prescription currently used in the Particle Data Group tables. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 322033
• Journal Information: Physical Review, D, Vol. 59, Issue 7; Other Information: PBD: Apr 1999
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
QUANTUM CHROMODYNAMICS
VECTOR MESONS
VECTOR DOMINANCE MODEL
S MATRIX
SYMMETRY
CHIRAL SYMMETRY