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François Gelis Brookhaven In this talk, I discuss the present status of the calculation of the photon or dilepton production rate by a quark-gluon plasma, starting with the discussion of well known contributions like bremsstrahlung, and of their phenomenological importance. Then, I present the results of a study of higher order diagrams, and show that the question of whether corrections to bremsstrahlung are important is controlled by only three characteristic quantities, which are the photon formation time, the mean free path of the quarks in the plasma, and the screening length of magnetic interactions.
Tuesday, November 21st 2000, 13:15 |