High momentum dilepton production from jets in a quark gluon plasma Academic Article uri icon

abstract

  • We discuss the emission of high momentum lepton pairs (pT>4 GeV) in central Au+Au collisions at RHIC (sNN=200 GeV) and Pb+Pb collisions at the LHC (sNN=5500 GeV). Yields of dileptons produced through interactions of jets with thermal partons have been calculated, with next-to-leading order corrections through hard thermal loop (HTL) resummation. They are compared to thermal dilepton emission and the Drell-Yan process. A complete leading order treatment of jet energy loss has been included. Jet-plasma interactions are found to dominate over thermal dilepton emission for all values of the invariant mass M. Drell-Yan is the dominant source of high momentum lepton pairs for M>3 GeV at RHIC, after the background from heavy quark decays is subtracted. At LHC, the range M<7 GeV is dominated by jet-plasma interactions. Effects from jet energy loss on jet-plasma interactions turn out to be weak, but non-negligible, reducing the yield of low-mass dileptons by about 30%. © 2006 The American Physical Society.

author list (cited authors)

  • Turbide, S., Gale, C., Srivastava, D. K., & Fries, R. J.

citation count

  • 28

publication date

  • July 2006