Twist-three observables in deeply virtual Compton scattering on the nucleon
High Energy Physics - Phenomenology
2009-11-07 v2
Abstract
We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal angle allows for a clear separation of twist-two and -three effects. Although the latter are power suppressed, they give leading contributions to the twist-three asymmetries and do not affect the twist-two observables.
Cite
@article{arxiv.hep-ph/0103343,
title = {Twist-three observables in deeply virtual Compton scattering on the nucleon},
author = {A. V. Belitsky and A. Kirchner and D. Müller and A. Schäfer},
journal= {arXiv preprint arXiv:hep-ph/0103343},
year = {2009}
}
Comments
10 pages, LaTeX