Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering

TL;DR

This paper analyzes the Sivers effect in semi-inclusive deep inelastic scattering, fitting experimental data to determine quark and antiquark Sivers distribution functions for pions and kaons, and providing predictions for future experiments.

Contribution

It introduces a new fit of Sivers distribution functions using recent high-statistics data for pion and kaon production in SIDIS, improving understanding of spin asymmetries.

Findings

Determined Sivers functions for u, d, s quarks and antiquarks.

Provided predictions for upcoming SIDIS experiments at COMPASS and JLab.

Enhanced the understanding of transverse spin asymmetries in hadron production.

Abstract

We study the Sivers effect in the transverse single spin asymmetries (SSA) for pion and kaon production in semi-inclusive deep inelastic scattering (SIDIS) processes. We perform a fit of A^sin(phi_h-phi_S)_UT which, by including recent high statistics experimental data for pion and kaon production from HERMES and COMPASS Collaborations, allows a new determination of the Sivers distribution functions for quarks and antiquarks with u, d and s flavours. Estimates for forthcoming SIDIS experiments at COMPASS and JLab are given.