Quark dispersion relation and dilepton production in the quark-gluon plasma
Under very general assumptions we show that the quark dispersion relation in the quark-gluon plasma is given by two collective branches, of which one has a minimum at a nonvanishing momentum. This general feature of the quark dispersion relation leads to structures (van Hove singularities, gaps) in the low mass dilepton production rate, which might provide a unique signature for the quark-gluon plasma formation in relativistic heavy ion collisions.
Peshier
A
Forschungszentrum Rossendorf, PF 510119, 01314 Dresden, Germany.
Thoma
MH