Transverse single spin asymmetries at small x and the anomalous magnetic moment

TL;DR

This paper demonstrates that in the McLerran-Venugopalan model, polarized odderons arising from axial asymmetries in valence quark distributions can explain transverse single spin asymmetries observed in jet and charm production.

Contribution

It introduces the concept of a polarized odderon generated by axial asymmetries in valence quarks within the McLerran-Venugopalan model as a novel explanation for SSAs.

Findings

Polarized odderon can produce SSAs in jet and charm production.

Axial asymmetries in valence quarks lead to spin-dependent odderons.

The model explains SSAs in the backward region of pp collisions and semi-inclusive DIS.

Abstract

We show that in the Mclerran-Venugopalan model, an axial asymmetrical valence quark distributions in the transverse plane of a transversely polarized proton can give rise to a spin dependent odderon. Such polarized odderon is responsible for the transverse single spin asymmetries(SSAs) for jet production in the backward region of pp collisions and open charm production in semi-inclusive DIS process.