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.