arXiv:hep-ph/0601203·v2·High Energy Physics — Phenomenology
Analysis of charmonium production at fixed-target experiments in the NRQCD approach
F. Maltoni🇧🇪 · J. Spengler🇩🇪 · M. Bargiotti🇮🇹 · A. Bertin🇮🇹 · M. Bruschi🇮🇹 · S. De Castro🇮🇹 · L. Fabbri🇮🇹 · P. Faccioli🇮🇹 · B. Giacobbe🇮🇹 · F. Grimaldi🇮🇹 · I. Massa🇮🇹 · M. Piccinini🇮🇹
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.