World data of J/psi production consolidate NRQCD factorization at NLO
Abstract
We calculate the cross sections of inclusive J/psi production in photoproduction and two-photon scattering, involving both direct and resolved photons, and in e^+e^- annihilation at next-to-leading order (NLO) within the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), including the full relativistic corrections due to the intermediate ^1S_0^{[8]}, ^3S_1^{[8]}, and ^3P_J^{[8]} color-octet (CO) states. Exploiting also our previous results on hadroproduction, we perform a combined fit of the respective CO long-distance matrix elements (LDMEs) to all available high-quality data of inclusive J/psi production, from KEKB, LEP~II, RHIC, HERA, the Tevatron, and the LHC, comprising a total of 194 data points from 26 data sets.
Keywords
Cite
@article{arxiv.1105.0820,
title = {World data of J/psi production consolidate NRQCD factorization at NLO},
author = {Mathias Butenschoen and Bernd A. Kniehl},
journal= {arXiv preprint arXiv:1105.0820},
year = {2015}
}
Comments
8 pages; 28 figures