# A direct extraction of the Sivers distributions from spin asymmetries in pion and kaon leptoproduction

## TL;DR

This paper introduces a direct, data-driven method to extract Sivers distributions from spin asymmetry measurements in pion and kaon leptoproduction, utilizing combined proton and deuteron data from COMPASS.

## Contribution

It provides a novel point-by-point extraction technique for Sivers distributions based on semi-inclusive deep inelastic scattering data, with simple assumptions and combined target analysis.

## Key findings

- Successful extraction of Sivers distributions from experimental data
- Demonstration of the method's applicability to proton and deuteron targets
- Enhanced understanding of transverse spin phenomena in hadron leptoproduction

## Abstract

We present a point-by-point determination of the Sivers distributions from hadron leptoproduction data. The method, which relies on some simple assumptions, is based on the combined analysis of proton and deuteron observables. We make use of the single-spin asymmetries measured by COMPASS in semi-inclusive deep inelastic scattering of 160 GeV muons on transversely polarized proton and deuteron targets.