Spin structure in non-forward partons
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
Renormalisation induces anomalous contributions in light-cone correlation functions. We discuss the role of the axial anomaly and gluon topology in non-forward parton distributions noting that non-forward matrix elements of the gluonic Chern-Simons current K_{\mu} are not gauge-invariant even in perturbation theory. The axial anomaly means that one has to be careful how to interpret information from hard exclusive reactions about the orbital angular-momentum carried by the proton's internal constituents.
Keywords
Cite
@article{arxiv.hep-ph/0102036,
title = {Spin structure in non-forward partons},
author = {Steven D. Bass},
journal= {arXiv preprint arXiv:hep-ph/0102036},
year = {2009}
}
Comments
15 pages