A_N in inclusive lepton-proton collisions

TL;DR

This paper estimates the transverse single spin asymmetry A_N in inclusive lepton-proton collisions using TMD factorization and compares the results with experimental data, providing predictions for future experiments.

Contribution

It applies Sivers and Collins functions from SIDIS data to predict A_N in lepton-proton collisions, demonstrating agreement with existing data and offering future experimental predictions.

Findings

A_N estimates agree with experimental data in sign and shape

The approach successfully uses TMD factorization with SIDIS-extracted functions

Predictions for future measurements are provided

Abstract

Some estimates for the transverse single spin asymmetry, A_N, in the inclusive processes l p(transv. pol.) -> h X are compared with new experimental data. The calculations are based on the Sivers and Collins functions as extracted from SIDIS azimuthal asymmetries, within a transverse momentum dependent factorization approach. The values of A_N thus obtained agree in sign and shape with the data. Predictions for future experiments are also given.