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. Weiss11 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
birgitd@tp2.ruhr-uni-bochum.de
goeke@tp2.ruhr-uni-bochum.de
maximp@tp2.ruhr-uni-bochum.de
peterw@tp2.ruhr-uni-bochum.de
strikman@physics.psu.edu
weiss@tp2.ruhr-uni-bochum.de
(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-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