Spin effects in diffractive $Q\bar{Q}$ production at BNL eRHIC

Abstract

We discuss quark-antiquark leptoproduction within a QCD two-gluon exchange model at small $x$. The double spin asymmetries for longitudinally polarized leptons and transversely polarized protons in diffractive $Q\bar{Q}$ production are analysed at eRHIC energies. The predicted $A_{lT}$ asymmetry is large and can be used to obtain information on the polarized generalized gluon distributions in the proton.

Comments: Some modifications of the text and graphs were done. Title is modified slightly. To be published in Phys. Rev. D