Eur. Phys. J. C (2006) 47: 643-653
https://doi.org/10.1140/epjc/s2006-02573-y

Theoretical Physics

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

D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia

^* e-mail: lipatov@theory.sinp.msu.ru

Received: 12 December 2005
Revised: 13 February 2006
Published online: 14 July 2006

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.