Charm Photoproduction At Large Transverse Momentum And The Charm Content Of The Photon

Abstract

The charm quark photoproduction at large transverse momentum in the resolved photon interaction via partonic subprocess $\text{cg}$ is studied. It is shown that at HERA energies the contribution of the charm quark excitation in the photon in the inclusive charm production at $\text{pt}>5$ GeV/c dominates over the other resolved photon contribution via the gluon content of the photon and it is about 30\% of the contribution of the $c\bar{c}$-pair production via the photon-gluon fusion mechanism.

Comments: LaTeX, 4 pages, 4 figures are not included