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

الأصل · EN

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= γₐγB (γₐ,B are the Lorentz factors of colliding nuclei). We found considerable reduction of the Coulomb corrections even for large γₐγB 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.