Resummation of nuclear enhanced higher twist in the Drell Yan process
High Energy Physics - Phenomenology
2009-11-07 v3 Nuclear Theory
Abstract
We investigate higher twist contributions to the transverse momentum broadening of Drell Yan pairs in proton nucleus collisions. We revisit the contribution of matrix elements of twist-4 and generalize this to matrix elements of arbitrary twist. An estimate of the maximal nuclear broadening effect is derived. A model for nuclear enhanced matrix elements of arbitrary twist allows us to give the result of a resummation of all twists in closed form. Subleading corrections to the maximal broadening are discussed qualitatively.
Keywords
Cite
@article{arxiv.hep-ph/0209275,
title = {Resummation of nuclear enhanced higher twist in the Drell Yan process},
author = {R. J. Fries},
journal= {arXiv preprint arXiv:hep-ph/0209275},
year = {2009}
}
Comments
10 pages, 5 figures; v2: minor changes in text, acknowledgement added; v3: mistake in fig. 1 corrected