Impact-parameter dependence of multiple lepton-pair production from electromagnetic fields

M. C. Güçlü*, J. C. Wells, A. S. Umar, M. R. Strayer, D. J. Ernst

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


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 semiclassical approximation is made for 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 and 160 A GeV, respectively. We also compare our results with the equivalent-photon approximation and elucidate the differences.

Original languageEnglish
Pages (from-to)1836-1844
Number of pages9
JournalPhysical Review A
Issue number3
Publication statusPublished - 1995
Externally publishedYes


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