$πωρ$ vertex in nuclear matter

Details $πωρ$ vertex in nuclear matter $πωρ$ vertex in nuclear matter

2002-06-17

arxiv.org/abs/nucl-th/0206034v1

Physics

Nuclear Physics

Nuclear Theory

3 pages, 2 Postscript figures, uses appolb.cls (included). Presented at 7th International Workshop on Meson Production, Proper

Scientific paper

Medium modifications of the $\pi \omega \rho$ vertex are analyzed in context of the $\omega \to \pi^0 \gamma^\ast$ and $\rho \to \pi \gamma^\ast$ decays in nuclear matter. A relativistic hadronic model with mesons, nucleons, and $\Delta(1232)$ isobars is applied. A substantial increase of the widths for the decays $\omega \to \pi^0 \gamma^\ast$ and $\rho \to \pi \gamma^\ast$ is found for photon virtualities in the range $0.3-0.6$GeV. This enhancement has a direct importance for the description of dilepton yields from dalitz decays in relativistic heavy-ion collisions.

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