Azimuthal asymmetries in single polarized proton-proton Drell-Yan processes

Abstract

We study the azimuthal asymmetries in proton-proton Drell-Yan processes with one incident proton being transversely or longitudinally polarized. We consider particularly the asymmetries contributed by the leading-twist chiral-odd quark distributions. We analyze the asymmetries with sin(2φ + φS) and sin(2φ − φS) modulations in transverse single polarized p ↑ p Drell-Yan and sin 2φ asymmetries in longitudinal single polarized p → p Drell-Yan at the Relativistic Heavy Ion Collider, the Japan Proton Accelerator Research Complex, E906 (Fermi Lab), and the Nuclotron-based Ion Collider Facility (Joint Institute for Nuclear Research). We show that the measurements of the asymmetries in those facilities can provide valuable information of the chiral-odd structure of the nucleon both in the valence and sea regions.

Nuclear dependencies of azimuthal asymmetries in the Drell-Yan process

“…Such calculations have been carried out for hadron-hadron collisions; the results can be found in, e.g., Refs. [33][34][35].…”