Lepton pairs from a detonating quark-gluon plasma

The situation is considered where a quark-gluon plasma is produced in high energy heavy ion collision. Because of its rapid expansion this plasma may become supercooled and transform into hadrons via a detonation wave, the cross section for lepton pair production is calculated in this case and compared with earlier calculations where the plasma follows thermodynamic equilibrium. It is concluded that with the detonating mechanism most lepton pairs are produced inside the hadronic gas resulting from the detonation. To distinguish experimentally between different scenarios it is necessary to measure the angular distribution of the leptons which is predicted to be sin2theta in the rest frame of the lepton pair for a detonating quark-gluon plasma. (orig.)