Angular Dependence of the Nuclear Enhancement of Drell-Yan Pairs

Preprint

30 July 1999

preprint
Published by arXiv in arXiv

Abstract

We calculate the nuclear enhancement in the angular distribution of Drell-Yan pairs produced in proton-nucleus reactions. Nuclear effects are encoded in universal twist-4 parton correlation functions. We find that the Lam-Tung relation for the angular coefficients of the lepton-pair distribution holds for the double-hard, but not for the soft-hard contribution. We also predict that nuclear enhancement effects at RHIC energies can be large.

Keywords

NUCLEAR ENHANCEMENT
ANGULAR DEPENDENCE
DRELL YAN PAIRS
DISTRIBUTION
YAN PAIRS
TWIST
HARD

All Related Versions

Version 1, 1999-07-30, ArXiv
Version 2, 1999-08-12, ArXiv
Version 3, 1999-10-09, ArXiv
Published version: Physical Review Letters, 83 (21), 4261.

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