The Longitudinal Structure Function at the Third Order
High Energy Physics - Phenomenology
2010-04-05 v2
Abstract
We compute the complete third-order contributions to the coefficient functions for the longitudinal structure function F_L, thus completing the next-to-next-to-leading order (NNLO) description of unpolarized electromagnetic deep-inelastic scattering in massless perturbative QCD. Our exact results agree with determinations of low even-integer Mellin moments and of the leading small-x terms in the flavour-singlet sector. In this letter we present compact and accurate parametrizations of the results and illustrate the numerical impact of the NNLO corrections.
Cite
@article{arxiv.hep-ph/0411112,
title = {The Longitudinal Structure Function at the Third Order},
author = {S. Moch and J. A. M. Vermaseren and A. Vogt},
journal= {arXiv preprint arXiv:hep-ph/0411112},
year = {2010}
}
Comments
11 pages, LaTeX, 4 eps-figures. DESY preprint number corrected