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Resummation of nuclear enhanced higher twist in the Drell Yan process

R. J. Fries
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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.

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R. J. Fries. 2002-11-07. Resummation of nuclear enhanced higher twist in the Drell Yan process. https://doi.org/10.1103/physrevd.68.074013

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