Charm fragmentation and associated J/ψ plus Z/W± production at the LHC

We consider the production of electroweak Z or W-+/- bosons associated with J/psi mesons at the LHC conditions. Our attention is focused on new partonic subprocesses which yet have never been considered in the literature, namely, the charmed or strange quark excitation subprocesses followed by the charmed quark fragmentation c -> J/psi + c. Additionally we take into account the effects of multiple quark and gluon radiation in the initial and final states. We find that the contributions from the new mechanisms are important and significantly reduce the gap between the theoretical and experimental results on the J/psi + Z and J/psi + W-+/- production cross sections.

Automated summary

The study found that under LHC conditions, the production processes associated with J/psi mesons have new significant contributions, which significantly reduce the gap between theoretical and experimental results.