Eur. Phys. J. C 18, 719-722
Polarized antiquark flavor asymmetry in Drell-Yan pair productionB. Dressler1, K. Goeke1, M.V. Polyakov1, 2, P. Schweitzer1, M. Strikman3 and C. Weiss1
1 Institut für Theoretische Physik II, Ruhr-Universität Bochum, 44780 Bochum, Germany
2 Petersburg Nuclear Physics Institute, Gatchina, St.Petersburg 188350, Russia
3 Pennsylvania State University, University Park, PA 16802, USA
(Received: 31 May 2000 / Revised version: 1 December 2000 / Published online: 5 February 2001 -© Springer-Verlag 2001)
We investigate the role of the flavor asymmetry of the nucleon's polarized antiquark distributions in Drell-Yan lepton pair production in polarized nucleon-nucleon collisions at HERA (fixed-target) and RHIC energies. It is shown that the large polarized antiquark flavor asymmetry predicted by model calculations in the large-Nc limit (chiral quark-soliton model) has a dramatic effect on the double spin asymmetries in high mass lepton pair production, as well as on the single spin asymmetries in lepton pair production through -bosons at M2 = MW2.
© Società Italiana di Fisica, Springer-Verlag 2001