Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC

  • We investigate the lepton pair production with the Drell-Yan process in relativistic heavy ion collisions by computing the double differential cross section d σ/d M 2d yand d σ/d M 2d x Fat the next-to-leading order in p+Au and Au+Au collisions with √ sNN=200 GeV at RHIC. The resulting nuclear modification factors R pAuand R AuAushow strong sensitivity to the cold nuclear matter (CNM) effects and could probe the CNM effects at a very wide region of the longitudinal momentum fraction x. The variation of Rwith the invariant mass M, the rapidity yand the Feynman variable x Fis shown and we find that the nuclear modification factor for the double differential cross section could be smaller than 0.4 in some kinematic regions of high-energy nucleus-nucleus reactions at RHIC.
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FENG Xiu-Mei and ZHANG Ben-Wei. Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC[J]. Chinese Physics C, 2011, 35(9): 829-832. doi: 10.1088/1674-1137/35/9/008
FENG Xiu-Mei and ZHANG Ben-Wei. Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC[J]. Chinese Physics C, 2011, 35(9): 829-832. doi:10.1088/1674-1137/35/9/008 shu
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Received: 2010-11-30
Revised: 2010-12-30
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    Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC

      Corresponding author:FENG Xiu-Mei,
      Corresponding author:ZHANG Ben-Wei,

      Abstract:We investigate the lepton pair production with the Drell-Yan process in relativistic heavy ion collisions by computing the double differential cross section dσ/dM2dyand dσ/dM2dxFat the next-to-leading order in p+Au and Au+Au collisions with √sNN=200 GeV at RHIC. The resulting nuclear modification factorsRpAuandRAuAushow strong sensitivity to the cold nuclear matter (CNM) effects and could probe the CNM effects at a very wide region of the longitudinal momentum fractionx. The variation ofRwith the invariant massM, the rapidityyand the Feynman variablexFis shown and we find that the nuclear modification factor for the double differential cross section could be smaller than 0.4 in some kinematic regions of high-energy nucleus-nucleus reactions at RHIC.

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