1999/07/31 by Rainer J. Fries, R. J. Fries, B. Müller +4 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevlett.83.4261
published as Phys.Rev.Lett.83:4261-4264,1999 · 4 pages LaTeX, 5 figures; v2: discussion in the summary extended, some references added; v3: manuscript somewhat shortened, eq. (9) added, accepted for publication in Phys. Rev. Lett
arxiv created 1999/10/09 · openalex publication_date 1999/11/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 the Relativistic Heavy Ion Collider energies can be large.