Revisiting unitarity corrections for electromagnetic processes in collisions of relativistic nuclei

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 light-by-light scattering block between colliding nuclei. We obtain improved results for the corrections to e+e- and mu+mu- pair production, as well as new results for unitarity corrections to the production of photons via virtual Compton and virtual Delbruck scattering. These corrections can be numerically large; e.g., the mu+mu- pair production cross section is reduced by about 50% and the nuclear bremsstrahlung by about 15 to 20%.

9 pages; LaTeX

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Cited by in corpus (7)

• Exclusive muon-pair productions in ultrarelativistic heavy-ion collisions: Realistic nucleus charge form factor and differential distributions
• Nuclear form factor, validity of the equivalent photon approximation and Coulomb corrections to muon pair production in photon-nucleus and nucleus-nucleus collisions
• Double scattering production of two positron-electron pairs in ultraperipheral heavy-ion collisions
• Higher Order QED Calculation of Ultrarelativistic Heavy Ion Production of mu+ mu- Pairs
• Strong suppression of Coulomb corrections to the cross section of e+e- pair production in ultrarelativistic nuclear collisions
• Coulomb Corrections to the Parameters of the Moliere Multiple Scattering Theory
• Production of $e^{+}{e}^{-}$ in proton-lead collision: photon-photon fusion