Unintegrated gluon distributions in D*± and dijet associated photoproduction at HERA

Abstract

We consider the photoproduction of D^*± mesons associated with two hadron jets at HERA collider in the framework of the k_T-factorization approach. The unintegrated gluon densities in a proton are obtained from the full CCFM, from unified BFKL-DGLAP evolution equations as well as from the Kimber–Martin–Ryskin prescription. Resolved photon contributions are reproduced by the initial-state gluon radiation. We investigate different production rates and make a comparison with the recent experimental data taken by the ZEUS collaboration. Special attention is given to the specific dijet correlations which can provide unique information about non-collinear gluon evolution dynamics.