Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1994-10-26
Phys.Rev.A51:1836-1844,1995
Physics
Nuclear Physics
Nuclear Theory
16 pages
Scientific paper
10.1103/PhysRevA.51.1836
In relativistic heavy-ion collisions, the strong Lorentz-contracted electromagnetic fields are capable of producing copious numbers of lepton pairs through the two-photon mechanism. Monte Carlo techniques have been developed that allow the exact calculation of production by this mechanism when a semi-classical approximation is made to the motion of the two ions. Here, we develop a hybrid Monte Carlo technique that enables us to calculate the impact parameter dependence of the two-photon mechanism for lepton-pair production, and by using this result, we obtain the probability distribution for multiple-pair production as a function of impact parameter. Computations are performed for S$+$Au and Pb$+$Pb systems at 200 A GeV and 160 A GeV, respectively. We also compare our results with the equivalent photon approximation and elucidate the differences.
Ernst David J.
Guclu M. C.
Strayer Michael R.
Umar Sait A.
Wells Christopher J.
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