The Collins function: a simple model calculation
Abstract
The Collins function belongs to the class of the so-called time-reversal odd fragmentation functions. Being chiral-odd as well, it can serve as an important tool to observe the nucleon's transversity distribution in semi-inclusive DIS. Due to the possible presence of final state interactions, this function can be non-zero, though this has never been demonstrated in an explicit model calculation. We use a simple pseudoscalar coupling between pions and quarks to model the fragmentation process and we show that the inclusion of one-loop corrections generates a non-vanishing Collins function, therefore giving support to its existence from the theoretical point of view.
Cite
@article{arxiv.hep-ph/0102278,
title = {The Collins function: a simple model calculation},
author = {A. Bacchetta and R. Kundu and A. Metz and P. J. Mulders},
journal= {arXiv preprint arXiv:hep-ph/0102278},
year = {2009}
}
Comments
Revtex, 4 pages, 4 figures, two references added, to be published on Physics Letters B