Abstract
Unitarity corrections to several electromagnetic processes in collisions of relativistic heavy nuclei are considered. They are due to the unitarity requirement for the S-matrix and correspond to the exchange of a light-by-light scattering block between colliding nuclei. We obtain improved results for the corrections to e + e − and μ + μ − pair production as well as new results for unitarity corrections to the production of photons via virtual Compton and virtual Delbrück scattering. These corrections can be numerically large; e.g., the μ + μ − pair production cross section is reduced by about 50% and nuclear bremsstrahlung by about 15÷20%.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License ( https://creativecommons.org/licenses/by-nc/2.0 ), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Jentschura, U.D., Hencken, K. & Serbo, V.G. Revisiting unitarity corrections for electromagnetic processes in collisions of relativistic nuclei. Eur. Phys. J. C 58, 281–289 (2008). https://doi.org/10.1140/epjc/s10052-008-0773-5
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DOI: https://doi.org/10.1140/epjc/s10052-008-0773-5