Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-03-02
Zh.Eksp.Teor.Fiz.136: 1121,2009; J.Exp.Theor.Phys.109:968,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, RevTeX
Scientific paper
10.1134/S1063776109120073
The Coulomb corrections to the cross section of $e^+e^-$ pair production in ultrarelativistic nuclear collisions are calculated in the next-to-leading approximation with respect to the parameter $L=\ln \gamma_A\gamma_B$ ($\gamma_{A,B}$ are the Lorentz factors of colliding nuclei). We found considerable reduction of the Coulomb corrections even for large $\gamma_A\gamma_B$ due to the suppression of the production of $e^+e^-$ pair 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 were not observed in the experiment at SPS.
Lee Roman N.
Milstein Alexander I.
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