Twist-3 effects in deeply virtual Compton scattering made simple
High Energy Physics - Phenomenology
2017-08-23 v1
Abstract
We show that electromagnetic gauge invariance requires a 'spin rotation' of the quarks in the usual twist-2 contribution to the amplitude for deeply virtual Compton scattering. This rotation is equivalent to the inclusion of certain kinematical twist-3 (Wandzura-Wilczek type) terms, which have been derived previously using other methods. The new representation of the twist-3 terms is very compact and allows for a simple physical interpretation.
Cite
@article{arxiv.hep-ph/0210237,
title = {Twist-3 effects in deeply virtual Compton scattering made simple},
author = {C. Weiss},
journal= {arXiv preprint arXiv:hep-ph/0210237},
year = {2017}
}
Comments
4 pages, 3 figures, uses ws-p8-50x6-00.cls . Proceedings of the Baryons 2002 Conference, Jefferson Lab, Newport News, VA, March 3-8, 2002