Abstract
Dilepton production rates in nuclear collisions are calculated in order to study their sensitivity to the quark-gluon plasma and to the hadronic phases. This treatment differs from previous work on the subject in two respects: The width of the rho-meson, being exchanged in ππ annihilation, is made temperature dependent, thus taking into account resonance melting as the critical deconfinement temperatureT d is approached. Secondly, we study in addition to the standard scenario where chiral symmetry restoration and deconfinement occur at the same temperature (T c =T d ), an alternative possibility where deconfinement preceeds chiral symmetry restoration (T d <T c ). Results differ substantially from those obtained assuming a temperature independent rho-meson width, andT c =T d .
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Dominguez, C.A., Loewe, M. Dimuon production in ultrarelativistic nuclear collisions and QCD phase transitions. Z. Phys. C - Particles and Fields 49, 423–430 (1991). https://doi.org/10.1007/BF01549695
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DOI: https://doi.org/10.1007/BF01549695