Dilepton yields from Brown-Rho scaled vector mesons including memory effects

Details Dilepton yields from Brown-Rho scaled vector mesons including memory effects Dilepton yields from Brown-Rho scaled vector mesons including memory effects

2006-08-03

arxiv.org/abs/hep-ph/0608032v1

Phys.Rev.Lett.98:022301,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.98.022301

Brown-Rho scaling, which has been strongly discussed after recent NA60 data was presented, is investigated within a nonequilibrium field theoretical description that includes quantum mechanical memory. Dimuon yields are calculated by application of a model for the fireball, and strong modifications are found in the comparison to quasi-equilibrium calculations, which assume instantaneous adjustment of all meson properties to the surrounding medium. In addition, we show results for the situation of very broad excitations.

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