Vector-meson dominance revisited
نویسندگان
چکیده
منابع مشابه
Vector meson dominance and the ρ meson
We discuss the properties of vector mesons, in particular the ρ 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. Firstly, 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 re...
متن کاملVector Meson Dominance and Rho-Omega Mixing
The scale of a phenomenologically successful charge-symmetry-violating nucleon-nucleon interaction, that attributed to meson exchange with a ∆I = 1 rho-omega transition, is set by the Coleman-Glashow SU(2) breaking tadpole mechanism. A single tadpole scale has been obtained from symmetry arguments, electromagnetic meson and baryon measured mass splittings, and the observed isospin violating (∆I...
متن کاملNew Results in Vector Meson Dominance and Rho Meson Physics
Recent results by Benayoun et al. comparing the predictions of a range of existing models based on the Vector Meson Dominance hypothesis are summarized and discussed. These are compared with data on ee → ππ and ee → μμ cross-sections and the phase and near-threshold behavior of the timelike pion form factor, with the aim of determining which (if any) of these models is capable of providing an a...
متن کاملEquivalence Between Vector Meson Dominance and Unitarised Chiral Perturbation Theory
It is explicitly shown that the solution of the integral equation for the inverse of the form factor or the Padé approximant method to resum the one loop Chiral Perturbation Theory (CPTH) are equivalent to the standard vector meson dominance (VMD) models using the vector meson coupling to two pseudoscalars given by the KSRF relation. Inconsistencies between the one loop CPTH and its unitarised ...
متن کاملFluctuations of Photon Projectile in Generalized Vector Meson Dominance Model
We explain that the generalized vector meson dominance (GVMD) model is successful in describing hard high energy processes because it contains expected in QCD Color Coherent Phenomena. Within the model, which reproduces Bjorken scaling and nuclear shadowing for deep inelastic processes, we calculate P γ (σ, Q 2), the probability for the photon to interact with a target with the cross section σ....
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2012
ISSN: 2100-014X
DOI: 10.1051/epjconf/20123705008