Kinematical correlations: from RHIC to LHC

Abstract

Kinematical correlations between outgoing partons (elementary particles) are discussed in the framework of $k_t$-factorization. Different unintegrated gluon distributions are used. I discuss correlations between charm-anticharm, jets, photon and jet, and between leptons from semileptonic decays of heavy quarks as well as leptons produced in the Drell-Yan mechanism. Both correlations in azimuth as well as in the length of transverse momenta are shown. General conclusions are drawn.

Comments: 8 pages, 8 figures invited talk at the international workshop "High-pT Physics at LHC", Tokaj, Hungary, 16-19 March 2008