Direct J/psi photoproduction at next-to-leading-order in nonrelativistic QCD
Abstract
We calculate the cross section of inclusive direct J/psi photoproduction at next-to-leading order within the factorization formalism of nonrelativistic quantum chromodynamics, for the first time including the full relativistic corrections due to the intermediate ^1S_0^{[8]}, ^3S_1^{[8]}, and ^3P_J^{[8]} color-octet states. A comparison of our results to recent H1 data suggests that the color octet mechanism is indeed realized in J/psi photoproduction, although the predictivity of our results still suffers from uncertainties in the color-octet long-distance matrix elements.
Keywords
Cite
@article{arxiv.1006.1776,
title = {Direct J/psi photoproduction at next-to-leading-order in nonrelativistic QCD},
author = {Mathias Butenschoen and Bernd A. Kniehl},
journal= {arXiv preprint arXiv:1006.1776},
year = {2010}
}
Comments
5 pages, 2 figures, to appear in the Proceedings of the XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2010), Florence, Italy, 19-23 April 2010