Dilepton radiation from cascading partons in ultrarelativistic nuclear collisions

K. Geiger, J. I. Kapusta

Research output: Contribution to journalArticlepeer-review

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We compute the radiation of lepton pairs by the quarks during a central collision between gold nuclei at energy of the Brookhaven Relativistic Heavy Ion Collider (s =200A GeV) within the parton cascade model. The distribution of radiated pairs evolves smoothly from the initial Drell-Yan type reactions all the way towards equilibrium radiation. Contributions from reactions involving secondary partons dominate the Drell-Yan yield by at least a factor of 5 even at an invariant mass of 8 GeV. Therefore, experiments can test the evolution of partons towards thermal equilibrium at these energies.

Original languageEnglish (US)
Pages (from-to)1920-1923
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1993


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