J/psi production with NRQCD: HERA, Tevatron, RHIC and LHC
Abstract
We report on our recent calculation of the inclusive direct photo- and hadroproduction of the J/psi meson at next-to-leading order within the factorization formalism of nonrelativistic QCD. We fit the color-octet (CO) long-distance matrix elements <O^(J/psi)(1S0[8])>, <O^(J/psi)(3S1[8])> and <O^(J/psi)(3P0[8])> to the transverse momentum (p_T) distributions measured by CDF at Fermilab Tevatron and by H1 at DESY HERA and show that they also successfully describe the p_T distributions from PHENIX at BNL RHIC and CMS at the CERN LHC as well as the photon-proton c.m. energy and (with worse agreement) the inelasticity distributions from H1. In all experiments, the CO processes are shown to be indispensable.
Keywords
Cite
@article{arxiv.1011.5619,
title = {J/psi production with NRQCD: HERA, Tevatron, RHIC and LHC},
author = {Mathias Butenschoen and Bernd A. Kniehl},
journal= {arXiv preprint arXiv:1011.5619},
year = {2011}
}
Comments
3 pages, 2 figures, to appear in the proceedings of "The IX International Conference on Quark Confinement and the Hadron Spectrum", Madrid, Spain, 30 August - 3 September 2010