ИСТИНА

We investigate the role of parton fragmentation processes for associated gauge boson (Z or W) and J/psi production at the LHC conditions. We focused on new partonic subprocesses, namely, the charmed or strange quark excitation followed by the charmed quark fragmentation c -> J/psi + c. Additionaly we take into account the effects of multiple quark and gluon radiation in the initial and final states. We find that these contributions are important and reduce the gap between the theoretical predictions and experimental results.