A(LT) in the nucleon-nucleon polarized Drell-Yan process

We present a leading order (LO) estimate for the longitidinal-transverse sp in asymmetry (A(LT)) in the nucleon-nucleon polarized Drell-Yan process at RHIC and HERA-(N) over right arrow energies in comparison with A(LL) and A( TT). A(LT) receives contribution from g(1), the transversity distribution h i, and the twist-3 distributions g(T) and h(L). For the twist-3 contributio n we use the lag model prediction evolved to a high energy scale by the lar ge-iii, evolution equation. We found that A(LT) (normalized by the asymmetr y in the parton level) is much smaller than the corresponding A(TT) Twist-3 contribution given by the bag model turned out to be negligible.