Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-07-09
Phys.Rev.C56:1637-1646,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages in RevTeX, 3 epsf figures embedded
Scientific paper
10.1103/PhysRevC.56.1637
We calculate the dilepton emissions as the decay product of the charm and bottom quarks produced in heavy-ion collisions at RHIC energy. We take into account the next-to-leading-order radiative corrections in perturbative QCD to the heavy quark production from both an initial hard parton-parton scattering and an ideal quark-gluon plasma. We find that the thermal charm decay dominates the dilepton production in the low dilepton mass region ($<2$ GeV), while the heavy quark production from the initial scattering takes over the intermediate and high mass regions ($> 2$ GeV). Our result also indicates the importance of the bottom quark in the high mass region ($>4 $ GeV ) due to its large mass and cascade decay. If the initial scattering produced charm suffers a significant energy loss due to the secondary interaction, the bottom decay constitutes the major background for the thermal dileptons.
Fein David
Huang Zheng
Sarcevic Ina
Valerio Peter
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