Angular dependence of the nuclear enhancement of Drell-Yan pairs

Authors
Fries, RJ Muller, B Schafer, A Stein, E
Citation
Rj. Fries et al., Angular dependence of the nuclear enhancement of Drell-Yan pairs, PHYS REV L, 83(21), 1999, pp. 4261-4264
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
21
Year of publication
1999
Pages
4261 - 4264
Database
ISI
SICI code
0031-9007(19991122)83:21<4261:ADOTNE>2.0.ZU;2-R
Abstract
We calculate the nuclear enhancement in the angular distribution of Drell-Y an pairs produced in proton-nucleus reactions. Nuclear effects are encoded in universal twist-4 parton correlation functions. We find that the Lam-Tun g relation for the angular coefficients of the lepton-pair distribution hol ds for the double-hard, but not for the soft-hard, contribution. We also pr edict that nuclear enhancement effects at the Relativistic Heavy Ion Collid er energies can be large.