Collins fragmentation function from gluon rescattering
High Energy Physics - Phenomenology
2015-06-25 v2
Abstract
We estimate the Collins fragmentation function by introducing the effect of gluon rescattering in a model calculation of the fragmentation process. We include all necessary diagrams to the one-loop level and compute the nontrivial phases giving rise to the Collins function. We compare our results to the ones obtained from pion rescattering. We conclude that three out of four one-loop diagrams give sizeable contributions to the Collins function, and that the effect of gluon rescattering has a magnitude comparable to that of pion rescattering, but has opposite sign.
Cite
@article{arxiv.hep-ph/0307282,
title = {Collins fragmentation function from gluon rescattering},
author = {Alessandro Bacchetta and Andreas Metz and Jian-Jun Yang},
journal= {arXiv preprint arXiv:hep-ph/0307282},
year = {2015}
}
Comments
6 pages, 5 figures, uses RevTex. Typos corrected and a sentence added in the conclusions. To be published in PLB