Analysis of charmonium production at fixed-target experiments in the NRQCD approach
/ Authors
F. Maltoni, J. Spengler, M. Bargiotti, A. Bertin, M. Bruschi, S. Castro, L. Fabbri, P. Faccioli, B. Giacobbe, F. Grimaldi
and 7 more authors
I. Massa, M. Piccinini, N. Semprini-Cesari, R. Spighi, M. Villa, A. Vitale, A. Zoccoli
/ 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.
Journal: Physics Letters B