A transversity bound and higher order effects

Next-to-leading order (NLO) effects oil Soffer's transversity bound are stu died. It is shown that defining the NLO corrections to the transversity via Drell-Yan lepton-pair production, I,ut to the unpolarized and longitudinal ly polarized distributions via deep inelastic scattering. results in a subs tantial suppression of the bound for all q = u, d and sea. Moreover assumin g that the bound is saturated at Q(o)(2) = 4 GeV2 and evolving the NLO dist ributions to Q(2) > Q(o)(2) via 2-loop split functions, it is shown that th e bound is not violated.