Off-shell transport of broad resonances and dilepton production at SIS energies

Gy. Wolf; B. Kämpfer; M. Zétényi

doi:doi:10.1051/epjconf/20111306005

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Issue		EPJ Web of Conferences Volume 13, 2011 HCBM 2010 – International Workshop on Hot and Cold Baryonic Matter


Article Number		06005
Number of page(s)		5
Section		Transport Models
DOI		http://dx.doi.org/10.1051/epjconf/20111306005
Published online		19 April 2011

EPJ Web of Conferences 13, 06005 (2011)
http://dx.doi.org/10.1051/epjconf/20111306005

Off-shell transport of broad resonances and dilepton production at SIS energies

Gy. Wolf¹^a, B. Kämpfer² and M. Zétényi¹

¹ KFKIRMKI, H-1525 Budapest, POB 49, Hungary
² ForschungszentrumDresden-Rossendorf, Institut für Strahlenphysik, PF510119, 01314 Dresden, Germany

^a e-mail: wolf@rmki.kfki.hu

Published online: 19 April 2011

Abstract

The time evolution of vector meson spectral functions is studied within a Boltzmann-Uehling-Uhlenbeck (BUU) type transport model. Applications focus on ρ and ω mesons being important pieces for the interpretation of the dielectron invariant mass spectrum. Since the evolution of the spectral functions is driven by the local density, the in-medium modifications turn out to compete, in this approach, with the known vacuum contributions.