Thermal Dimuon Yields at NA60

Details Thermal Dimuon Yields at NA60 Thermal Dimuon Yields at NA60

2006-04-27

arxiv.org/abs/nucl-th/0604071v1

Phys.Rev.C75:024908,2007

Physics

Nuclear Physics

Nuclear Theory

9 pages, 8 figures

Scientific paper

10.1103/PhysRevC.75.024908

Dilepton emission rates from a hadronic gas at finite temperature and baryon density are completely constrained by broken chiral symmetry in a density expansion. The rates can be expressed in terms of vacuum correlations which are measured in $e^+e^-$ annihilation, $\tau$ decays and photo-reactions on nucleons and nuclei. In this paper, the theoretical results are summarized and the total dimuon yield is calculated by integrating the dimuon rates over the space-time history of a fireball based on hydrodynamic calculations with CERN SPS conditions. The resulting dimuon yield is in good agreement with the recent measurements reported by NA60.

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