Simplification of Higher-Twist Evolution in the Large N_c Limit: Why and Why Not
High Energy Physics - Phenomenology
2011-09-13 v1
Abstract
Working in the light-cone gauge, we find a simple procedure to calculate the autonomous one-loop Q^2 evolution of the twist-three part of the nucleon g_T(x, Q^2) structure function in the large-N_c limit. Our approach allows us to investigate the possibility of a similar large-N_c simplification for other higher-twist evolutions. In particular, we show that it does not occur for the twist-four part of the f_4(x, Q^2), g_3(x, Q^2) and h_3(x, Q^2) distributions. We also argue that the simplification of the twist-three evolution does not persist beyond one loop.
Keywords
Cite
@article{arxiv.hep-ph/9902393,
title = {Simplification of Higher-Twist Evolution in the Large N_c Limit: Why and Why Not},
author = {Xiangdong Ji and Jonathan Osborne},
journal= {arXiv preprint arXiv:hep-ph/9902393},
year = {2011}
}
Comments
8 pages, latex, figures included