High-Energy Production of ηc Mesons in Proton–Proton Collisions

The article considers the production of \({{\eta }_{{\text{c}}}}\) mesons at LHC energies using the parton Reggeization approach and the leading order perturbation theory of quantum chromodynamics. The hadronization of a quark–antiquark pair (\(c\bar {c}\)) in \({{{{\eta }}}_{{\text{c}}}}\) is described in the framework of nonrelativistic quantum chromodynamics and with the using of color evaporation model. The calculation results are compared with experimental data for the \({{\eta }_{{\text{c}}}}\) production cross section in proton–proton collisions obtained by the LHCb collaboration. Predictions have been made for the kinematic conditions of the LHCb and ATLAS collaboration experiments at an energy \(\sqrt s = \) 13 TeV.