arXiv:0901.3078·v1·High Energy Physics — Phenomenology
Sivers effect in Drell-Yan processes
M. Anselmino (1)🇮🇹 · M. Boglione (1)🇮🇹 · U. D'Alesio (2,3)🇮🇹 · S. Melis (1)🇮🇹 · F. Murgia (3)🇮🇹 · A. Prokudin (1) ((1) University and INFN, Torino, Italy, (2) University of Cagliari, Italy, (3) INFN, Cagliari, Italy)🇮🇹
Abstract
The Sivers distributions recently extracted from semi-inclusive deep inelastic scattering data [1] are used to compute estimates for Sivers asymmetries in Drell-Yan processes which are being planned at several facilities (RHIC, COMPASS, J-PARC, PAX, PANDA, NICA (JINR) and SPASCHARM (IHEP)). Most of these asymmetries turn out to be large and could allow a clear test of the predicted sign change of the Sivers distributions when active in SIDIS and Drell-Yan processes. This is regarded as a fundamental test of our understanding, within QCD and the factorization scheme, of single spin asymmetries.
Comments: RevTeX4, 12 pages, 23 eps figures