Phys. Rev. D 68, 074013 (2003) [10 pages]Resummation of nuclear enhanced higher twist in the Drell-Yan processReceived 1 November 2002; published 30 October 2003 We investigate higher twist contributions to the transverse momentum broadening of Drell-Yan pairs in proton nucleus collisions. We reexamine 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.68.074013
DOI:
10.1103/PhysRevD.68.074013
PACS:
12.38.Bx, 25.75.-q
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