Strong suppression of Coulomb corrections to the e{sup +}e{sup -} pair production cross section in ultrarelativistic nuclear collisions

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776109120073· OSTI ID:21443645

Lee, R. N., E-mail: [e-mail]; Milstein, A. I., E-mail: [e-mail].s ^[1]

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1. Russian Academy of Sciences, Budker Institute of Nuclear Physics, Siberian Branch (Russian Federation)

The Coulomb corrections to the e{sup +}e{sup -} pair production cross section in ultrarelativistic nuclear collisions are calculated in the next-to-leading approximation with respect to the parameter L = ln{gamma}{sub A{gamma}B}, where {gamma}{sub A,B} are the Lorentz factors of colliding nuclei. We find considerable reduction of the Coulomb corrections even for large {gamma}{sub A{gamma}B} due to the suppression of the e{sup +}e{sup -} pair production with the total energy of the order of a few electron masses in the rest frame of one of the nuclei. Our result explains why the deviation from the Born result was not observed in the SPS experiment.

• OSTI ID: 21443645
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 109, Issue 6; Other Information: DOI: 10.1134/S1063776109120073; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
COULOMB CORRECTION
CROSS SECTIONS
ELECTRONS
HEAVY ION REACTIONS
PAIR PRODUCTION
POSITRONS
RELATIVISTIC RANGE
REST MASS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CALCULATION METHODS
CORRECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
INTERACTIONS
LEPTONS
MASS
MATTER
NUCLEAR REACTIONS
PARTICLE PRODUCTION