NLO prescription for unintegrated parton distributions
High Energy Physics - Phenomenology
2010-03-19 v2
Abstract
We show how parton distributions unintegrated over the parton transverse momentum, k_t, may be generated, at NLO accuracy, from the known integrated (DGLAP-evolved) parton densities determined from global data analyses. A few numerical examples are given, which demonstrate that sufficient accuracy is obtained by keeping only the LO splitting functions together with the NLO integrated parton densities. However, it is important to keep the precise kinematics of the process, by taking the scale to be the virtuality rather than the transverse momentum, in order to be consistent with the calculation of the NLO splitting functions.
Keywords
Cite
@article{arxiv.0909.5529,
title = {NLO prescription for unintegrated parton distributions},
author = {A. D. Martin and M. G. Ryskin and G. Watt},
journal= {arXiv preprint arXiv:0909.5529},
year = {2010}
}
Comments
20 pages, 8 figures. v2: version to appear in Eur. Phys. J. C