Production of e+e− pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions
Recommended Citation
Published in Physical Review C, Volume 70, Issue 3, September 28, 2004, pages 031902-1-031902-6.
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The definitive version is available at https://doi.org/10.1103/PhysRevC.70.031902.
Abstract
We present data on e+e− pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200GeV 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.
Disciplines
Physics
Copyright
Number of Pages
6
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This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society.
NOTE: At the time of publication, the author Thomas Gutierrez was not yet affiliated with Cal Poly.
URL: https://digitalcommons.calpoly.edu/phy_fac/555