Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T06: QCD and Hadronic Physics
χ_c and χ_b meson produciton in high multiplicity events
M. Siddikov* and I. Schmidt
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Abstract
Recent studies of heavy $J/\psi$ and $D$-mesons production by the ALICE and STAR collaborations revealed a pronounced dependence of the cross-section on multiplicity of co-produced charged particles. One of the possible explanations of this phenomenon is the enhanced contribution of multipomeron configurations. We suggest that the study of the multiplicity dependence of $P$-wave quarkonia (e.g. $\chi_{c}$ and $\chi_{b}$ mesons) could provide decisive evidence in favor of this explanation. Due to different quantum numbers, the $P$-wave quarkonia will not get contributions from the three-pomeron mechanism, and for this reason should have significantly milder dependence on multiplicity. We also present detailed production cross-sections in the kinematics of ongoing experiments at LHC and RHIC.
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