Finite pion width effects on the rho-meson
نویسندگان
چکیده
منابع مشابه
Finite pion width effects on the rho–meson
We study the influence of the finite damping width of pions on the in–medium properties of the ρ–meson in an interacting meson gas model at finite temperature. Using vector dominance also implications on the resulting dilepton spectra from the decay of the ρ–meson are presented. A set of coupled Dyson equations with self–energies up to the sunset diagram level is solved self consistently. Follo...
متن کاملFinite pion width effects on the rho-meson and di-lepton spectra
Within a field theoretical model where all damping width effects are treated self-consistently we study the changes of the spectral properties of ρ-mesons due to the finite damping width of the pions in dense hadronic matter at finite temperature. The corresponding effects in the di-lepton yields are presented. Some problems concerning the self consistent treatment of vector or gauge bosons are...
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Using the local flavor SU(4) gauge invariance in the limit of vanishing vector meson masses, we extend our previous study of charm meson scattering cross sections by pion and rho meson, which is based only on the pseudoscalarpseudoscalar-vector meson couplings, to include also contributions from the couplings among three vector mesons and among four particles. We find that diagrams with light m...
متن کاملStructure of the rho meson and the pion form-factor
From the electromagnetic form factor of the pion and from the decay modes of the τ lepton involving two or three pions one can see that the isovector–vector quark current couples strongly to the ρ meson whereas the isovector– axial-vector current couples strongly to the a1. Therefore such reactions provide excellent access to studies of the properties of (axial-)vector mesons. It has been shown...
متن کاملMedium effects on the rho meson.
The property of a rho meson in dense nuclear matter is studied using the +CD sum rule. The spectral function appearing on the hadronic side of the sum rule is evaluated in the vector dominance model that takes into account the interaction between the rho meson and the pion. Including pion modification by the delta-hole polarization in the nuclear medium, we find that as the nuclear density incr...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2001
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(00)00462-0