Medium effects on meson couplings and dilepton spectra
Nuclear Theory
2009-11-10 v2
Abstract
The pi omega rho coupling constant is calculated in a relativistic hadronic framework incorporating nucleons and Delta(1232) isobars. Medium modifications are included. The vertex is analyzed in context of the omega to pi e+e- and rho to pi e+e- Dalitz decays in nuclear matter. A sizeable increase of the widths for these decays is found for invariant mass of dileptons in the range 0.2-0.5 GeV. This increase may help, among other medium effects, to explain the problem of the low-mass dilepton enhancement seen in relativistic heavy-ion collisions.
Cite
@article{arxiv.nucl-th/0401022,
title = {Medium effects on meson couplings and dilepton spectra},
author = {Agnieszka Bieniek},
journal= {arXiv preprint arXiv:nucl-th/0401022},
year = {2009}
}
Comments
8 pages, 8 figures, talk presented at the 3rd Budapest Winter School on Heavy Ion Physics, 8-11 December, 2003, Budapest, Hungary