First glances at the transversity parton distribution through dihadron fragmentation functions

TL;DR

This is the first attempt to determine the transversity distribution in the framework of collinear factorization, based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets.

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.

Figures (1)

• Figure 1: The $x h_1^{u_v} - x h_1^{d_v} / 4$ of Eq. (\ref{['eq:simple']}) as a function of $x$. The error bars are obtained by propagating the statistical errors of each term in the equation. The uncertainty band represents the same observable as deduced from the parametrization of Ref. Anselmino:2008jk.