Exclusive production of pion pairs with large invariant mass in nucleus-nucleus collisions

Abstract

The cross section for exclusive ${\pi }^{+}{\pi }^{-}$ and ${\pi }^0{\pi }^0$ meson pairs production in peripheral ultrarelativistic heavy-ion collisions is calculated at the energy available at the CERN Large Hadron Collider, i.e., $\sqrt{s_{NN}}=3.5$ TeV. The cross section for elementary $\gamma \gamma \to \pi \pi$ process is calculated with the help of the pQCD Brodsky-Lepage approach with the distribution amplitude used recently to describe the pion transition form factor measured by the BaBar Collaboration.

Comments: 6 pages, 5 figures, talk by M. Klusek-Gawenda at Low-x Meeting, June 2011, Santiago de Compostela, Galice, Spain