QCD Prediction of ATT for Small QT Dimuon Production in pp and pp̄ Collisions

Abstract

We present QCD prediction of double‐spin asymmetries (ATT) in transversely polarized Drell‐Yan process at small transverse momentum QT of dimuon. Resummation of large logarithmic corrections, relevant in small QT region, is performed up to next‐to‐leading logarithmic (NLL) accuracy. ATT at RHIC, J‐PARC and GSI are studied numerically in the corresponding kinematic regions. We show that the large ATT is obtained for small QT and moderate energies.