Exclusive $D\bar{D}$ meson pair production in peripheral ultrarelativistic heavy ion collisions

Abstract

The cross sections for exclusive $D^{+}{D}^{-}$ and $D^0\overline{D^0}$ meson pair production in peripheral nucleus - nucleus collisions are calculated and several differential distributions are presented. The calculation of the elementary $\gamma \gamma \to D\bar{D}$ cross section is done within the heavy-quark approximation and in the Brodsky- Lapage formalism with distribution amplitudes describing recent CLEO data on leptonic $D^{+}$ decay. Realistic (Fourier transform of charge density) charge form factors of nuclei are used to generate photon flux factors. Absorption effects are discussed and quantified. The cross sections of a few nb are predicted for RHIC and of a few hundreds of nb for LHC with details depending on the approximation made in calculating elementary $\gamma \gamma \to D\bar{D}$ cross sections.

Comments: 11 pages, 8 figures