Medium effects on meson couplings and dilepton spectra

Details Medium effects on meson couplings and dilepton spectra Medium effects on meson couplings and dilepton spectra

2004-01-12

arxiv.org/abs/nucl-th/0401022v2

Acta Phys.Hung. A22 (2005) 29-36

Physics

Nuclear Physics

Nuclear Theory

8 pages, 8 figures, talk presented at the 3rd Budapest Winter School on Heavy Ion Physics, 8-11 December, 2003, Budapest, Hung

Scientific paper

10.1556/APH.22.2005.1-2.5

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.

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