Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-08-19
Physics
Nuclear Physics
Nuclear Theory
9 pages, 13 figures an invited talk at the international conference "Hadron Structure 2011", Slovakia, June 2011
Scientific paper
We discuss exclusive production of lepton-antilepton, quark-antiquark, $\pi \pi$ and $\rho^0 \rho^0$ pairs in ultraperipheral, ultrarelativistic heavy-ion collisions. The cross sections for exclusive production of pairs of particles is calculated in Equivalent Photon Approximation (EPA). Realistic (Fourier transform of charge density) charge form factors of nuclei are used and the corresponding results are compared with the cross sections calculated with monopole form factor used in the literature. Absorption effects are discussed and quantified. The cross sections obtained with realistic form factors are significantly smaller than those obtained with the monopole form factors.
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