Analysis of charmonium production at fixed-target experiments in the NRQCD approach

Abstract

We present an analysis of the existing data on charmonium hadro-production based on non-relativistic QCD (NRQCD) calculations at the next-to-leading order (NLO). All the data on J/psi and psi' production in fixed-target experiments and on pp collisions at low energy are included. We find that the amount of color octet contribution needed to describe the data is about 1/10 of that found at the Tevatron.

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• Constraining gluon density of pions at large $x$ by pion-induced $J/\psi$ production
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• Physics with charmonia at the SPD experiment