  The question of the K factor in transversely polarised Drell-Yan (DY)
processes is examined. The transverse-spin case is peculiar for the absence of
a reference point in deeply inelastic scattering (DIS). Therefore, in order to
study more fully the possible effects of higher-order corrections on DY
asymmetries, a DIS definition for transversity is devised using a hypothetical
scalar (Higgs-like) vertex. The results show that some care may be required in
interpreting experimentally extracted partonic transversity, in particular when
comparing with model calculations or predictions.
