2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47329Calculations of cross-sections for the gluon-photon production of $B_c$ and $B_c^*$ mesons as well as for the production in $ep$-interactions at HERA are performed in the leading order of perturbative QCD. We show that the nonabelian structure of QCD leads to an essential forward-backward asymmetry in these processes.14 pages, epsf-style, 8 ps-figuresHigh Energy Physics - Phenomenologytext