2023 Impact factor 4.2
Particles and Fields

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. 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 $W^\pm$-bosons at M2 = MW2.

© Società Italiana di Fisica, Springer-Verlag 2001