Angular Dependence of the Nuclear Enhancement of Drell-Yan Pairs
R.J. Fries, B. M\"uller, A. Sch\"afer, E. Stein
TL;DR
This paper investigates how nuclear effects influence the angular distribution of Drell-Yan pairs in proton-nucleus collisions, revealing the conditions under which certain angular relations hold and predicting significant effects at RHIC energies.
Contribution
It introduces a calculation of nuclear enhancement effects using twist-4 parton correlation functions and analyzes the validity of the Lam-Tung relation in this context.
Findings
Lam-Tung relation holds for double-hard but not for soft-hard contributions.
Nuclear enhancement effects at RHIC energies can be substantial.
Nuclear effects are described using universal twist-4 parton correlation functions.
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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.