The Singlet g_2 Structure Function in the Next-to-Leading Order
High Energy Physics - Phenomenology
2009-10-31 v6
Abstract
Following a previous study of the one-loop factorization of the nonsinglet structure function of the nucleon, we present in this paper the next-to-leading order coefficient functions in the singlet sector. To obtain the result, the partonic processes of virtual Compton scattering off two and three "on-shell" gluons are calculated. A key step in achieving the correct factorization is to separate the correct twist-two contribution. The Burkardt-Cottingham sum rule is nominally satisfied at this order.
Cite
@article{arxiv.hep-ph/0007305,
title = {The Singlet g_2 Structure Function in the Next-to-Leading Order},
author = {A. V. Belitsky and Xiangdong Ji and Wei Lu and Jonathan Osborne},
journal= {arXiv preprint arXiv:hep-ph/0007305},
year = {2009}
}
Comments
9 pages, 3 figures, RevTeX4, some minor corrections