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Abhijit Majumder McGill Owing to their small rescattering cross-section, dileptons (and real photons) are ideal probes of the extreme conditions of strongly interacting systems, like the sought after quark-gluon-plasma. We investigate the effects of various higher order contributions to the spectrum of dileptons radiating from the deconfined parton sector in high energy heavy-ion collisions. In particular the influence of finite charge density effects on low and intermediate mass dileptons will be discussed. We will demonstrate the existence of a new set of processes in this regime, arising from the explicit breaking of charge conjugation invariance. The influence of two-loop radiative corrections on high mass dileptons will be discussed. Interpretations of loop diagrams in terms of spectators will be examined. In particular, the fate of divergences in the dilepton rates will be elucidated.
Tuesday, February 5th 2002, 13:10 |