Production of e+e− pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions Academic Article uri icon


  • © 2004 The American Physical Society. We present data on e+e-pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.

altmetric score

  • 4

author list (cited authors)

  • Adams, J., Aggarwal, M. M., Ahammed, Z., Amonett, J., Anderson, B. D., Arkhipkin, D., ... Zubarev, A. N.

citation count

  • 70

publication date

  • September 2004