First glances at the transversity parton distribution through dihadron fragmentation functions

TL;DR

This paper reports the first measurements of the transversity parton distribution using dihadron fragmentation functions from deep inelastic scattering, advancing understanding of nucleon spin structure.

Contribution

It introduces the first extraction of transversity distribution within collinear factorization using pion-pair production data.

Findings

First observation of transversity in this framework

Use of dihadron fragmentation functions from electron-positron data

Initial quantitative insights into transversity distribution

Abstract

We present first observations of the transversity parton distribution based on an analysis of pion-pair production in deep inelastic scattering off transversely polarized targets. The extraction of transversity relies on the knowledge of dihadron fragmentation functions, which we take from electron-positron annihilation measurements. This is the first attempt to determine the transversity distribution in the framework of collinear factorization.