Resummation of nuclear enhanced higher twist in the Drell Yan process

Details Resummation of nuclear enhanced higher twist in the Drell Yan process Resummation of nuclear enhanced higher twist in the Drell Yan process

2002-09-24

arxiv.org/abs/hep-ph/0209275v3

Phys.Rev. D68 (2003) 074013

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures; v2: minor changes in text, acknowledgement added; v3: mistake in fig. 1 corrected

Scientific paper

10.1103/PhysRevD.68.074013

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.

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