We have written a Fortran programme BCVEGPY, which is an event generator for the hadronic production of the Bc meson through the dominant hard subprocess gg→Bc(Bc∗)+b+cˉ. To achieve a compact programme, we have written the amplitude of the subprocess with the particle helicity technique and made it as symmetric as possible, by decomposing the gluon self couplings and then applying the symmetries. To check the programme, various cross sections of the subprocess have been computed numerically and compared with those in the literature. BCVEGPY is written in a PYTHIA-compatible format, thus it is easy to implement in PYTHIA.
@article{arxiv.hep-ph/0309120,
title = {BCVEGPY: An Event Generator for Hadronic Production of the B_c Meson},
author = {Chao-Hsi Chang and Chafik Driouichi and Paula Eerola and Xing-Gang Wu},
journal= {arXiv preprint arXiv:hep-ph/0309120},
year = {2011}
}