Eur. Phys. J. C 18, 719-722
DOI: 10.1007/s100520100567

Polarized antiquark flavor asymmetry in Drell-Yan pair production

B. Dressler¹, K. Goeke¹, M.V. Polyakov^{1, 2}, P. Schweitzer¹, M. Strikman³ and C. Weiss<sup>1

1</sup>  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

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(Received: 31 May 2000 / Revised version: 1 December 2000 / Published online: 5 February 2001 -© Springer-Verlag 2001)

Abstract
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-N_c 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 = M_W².

© Società Italiana di Fisica, Springer-Verlag 2001