Non-universality of transverse Coulomb exchange at small x
High Energy Physics - Phenomenology
2016-09-06 v1
Abstract
Within an explicit scalar QED model we compare, at fixed x << 1, the leading-twist K_T-dependent `quark' distribution f_q(x, K_T) probed in deep inelastic scattering and Drell-Yan production, and show that the model is consistent with the universality of f_q(x, K_T). The extension of the model from the aligned-jet to the 'symmetric' kinematical regime reveals interesting properties of the physics of Coulomb rescatterings when comparing DIS and DY processes. At small x the transverse momentum <k_T^2> induced by multiple scattering on a single centre is process dependent, as well as the transverse momentum broadening occurring in collisions on a finite size nuclear target.
Keywords
Cite
@article{arxiv.hep-ph/0505066,
title = {Non-universality of transverse Coulomb exchange at small x},
author = {J. Aichelin and F. Arleo and P. -B. Gossiaux and T. Gousset and S. Peigne and M. Thomas},
journal= {arXiv preprint arXiv:hep-ph/0505066},
year = {2016}
}
Comments
28 pages, 3 eps figures