We calculate spin, charge, and azimuthal asymmetries in deeply virtual Compton scattering at leading twist-two level. The measurement of these asymmetries gives an access to the imaginary and real part of all deeply virtual Compton scattering amplitudes. We note that a consistent description of this process requires taking into account twist-three contributions and give then a model dependent estimate of these asymmetries.
@article{arxiv.hep-ph/0004059,
title = {Leading twist asymmetries in deeply virtual Compton scattering},
author = {A. V. Belitsky and D. Müller and L. Niedermeier and A. Schäfer},
journal= {arXiv preprint arXiv:hep-ph/0004059},
year = {2009}
}
Comments
21 pages, LaTeX, 4 figures, typos in Eqs. 18, 41 and 49 corrected, references updated