Light-front transverse charge densities
Abstract
We discuss the recent interpretation of quark-distribution functions in the plane transverse to the light-cone direction. Such a mapping is model independent and allows one to build up multidimensional pictures of the hadron and to develop a semi-classical interpretation of the quark dynamics. We comment briefly the results obtained from the form factors of the nucleon. We show that a generalization to a target with arbitrary spin leads to a set of preferred values for the electromagnetic coupling characterizing structureless particles. Finally, we present the Wigner distribution for an unpolarized quark in an unpolarized proton and we propose an interpretation of the observed distortion as due to the orbital angular momentum of the quark.
Cite
@article{arxiv.1012.0169,
title = {Light-front transverse charge densities},
author = {Cédric Lorcé and Barbara Pasquini and Marc Vanderhaeghen},
journal= {arXiv preprint arXiv:1012.0169},
year = {2015}
}
Comments
Contributed to the 19th International Spin Physics Symposium (SPIN 2010), Sep 27-Oct 2, 2010, Juelich, Germany. 5 pages, 2 figures, 1 table, uses jpconf.cls, jpconf11.clo, iopams.sty (included)