Prompt hadroproduction of η c (1S, 2S) in the k T -factorization approach

Abstract

Abstract In this work, we present a thorough analysis of η c (1S, 2S) quarkonia hadroproduction in k ⊥-factorisation in the framework of the light-front potential approach for the quarkonium wave function. The off-shell matrix elements for the g * g * η c (1S, 2S) vertices are derived. We discuss the importance of taking into account the gluon virtualities. We present the transverse momentum distributions of η c for several models of the unintegrated gluon distributions. Our calculations are performed for four distinct parameterisations for the c c ¯ $$ c\overline{c} $$ interaction potential consistent with the meson spectra. We compare our results for η c (1S) to measurements by the LHCb collaboration and present predictions for η c (2S) production.

Keywords

• QCD Phenomenology