The spin-spin asymmetry in the Drell-Yan process with polarized protons in both the beam and target is discussed including $Z^0$ effects. The role which this quantity could play to test sea-quark polarization is considered above the $Z^0$ peak. Numerical calculations are made for models with a polarized and an unpolarized sea.

• Received 17 January 1986

DOI:https://doi.org/10.1103/PhysRevD.34.2893