The impact of the intrinsic charm quark content of a proton on the differential $\gamma +c$ cross section

We present a comparative analysis of the impact of the non-perturbative intrinsic charm quark content of a proton on the differential cross section of a gamma + c-jet in pp and p (p) over bar collisions, for the kinematic regions that are sensitive to this contribution. We discuss the Q(2) evolution of intrinsic quark distributions at the next-to-leading order (NLO) and present a code which provides these distributions as a function of x and Q(2) for any arbitrary Fock state probability. For the p (p) over bar collisions at the Tevatron, the results are compared with recent experimental data at root s = 1.96 TeV and also predictions for pp collisions at root s = 8 TeV and root s = 13 TeV for the Large Hadron Collider.