Target mass corrections for spin-dependent structure functions in collinear factorization
High Energy Physics - Phenomenology
2008-12-18 v2 High Energy Physics - Experiment
Nuclear Theory
Abstract
We derive target mass corrections (TMC) for the spin-dependent nucleon structure function g1 and polarization asymmetry A1 in collinear factorization at leading twist. The TMCs are found to be significant for g1 at large xB, even at relatively high Q^2 values, but largely cancel in A1. A comparison of TMCs obtained from collinear factorization and from the operator product expansion shows that at low Q^2 the corrections drive the proton A1 in opposite directions.
Cite
@article{arxiv.0808.2397,
title = {Target mass corrections for spin-dependent structure functions in collinear factorization},
author = {A. Accardi and W. Melnitchouk},
journal= {arXiv preprint arXiv:0808.2397},
year = {2008}
}
Comments
7 pages, 2 figures, to appear in Phys. Lett. B