$J/\psi + \gamma$ production at the CERN LHC

The associated production of J\psi + gamma at the LHC is studied within the NRQCD framework. It is shown that even for very large values of transverse momentum (p_T of the order of 50 GeV) the dominant contribution to this process is not fragmentation. This is because of the fact that fragmentation-type contributions to the cross-section come from only a q q(bar) initial state, which is suppressed at the LHC. We identify gg-initiated diagrams higher-order in alpha_s which do have fragmentation-type vertices. We find, however, that the contribution of these diagrams is negligibly small.