Inclusive photon production and photon-jet correlations in hadronic collisions

We compare results of kt-factorization approach and next-to-leading order collinear-factorization approach for photon-jet correlations in pp and collisions at RHIC, Tevatron and LHC energies. We discuss correlations in azimuthal angle between photon and jet as well as correlations in two-dimensional space of photon and jet transverse momenta. Different unintegrated gluon/parton distributions are used in the kt-factorization approach. The results depend on UGDF/UPDF used. The collinear NLO 2 → 3 contributions dominate over kt-factorization cross section at small relative azimuthal angles as well as for asymmetric transverse momentum configurations.