# XX International Workshop on Deep-Inelastic Scattering and Related Subjects

26-30 March 2012
University of Bonn
Europe/Berlin timezone

## Interference Fragmentation Functions and Transverse Spin Studies.

29 Mar 2012, 11:40
20m
Lecture Hall, Institute for Physical Chemistry (University of Bonn)

Spin physics

### Speaker

Aurore Courtoy (IFPA, AGO Dpt., Universite de Liege)

### Description

We report on the first extraction of interference fragmentation functions from the semi-inclusive production of two hadron pairs in back-to-back jets in $e^+e^-$ annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite $\pi^+\pi^-$ pairs is related to the transverse polarization of fragmenting quarks through a significant polarized dihadron fragmentation function. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process $ep^{\uparrow}\to e'(\pi^+\pi^-)X$ has led to the first extraction of the transversity parton distribution function in the framework of collinear factorization. This result is presented as well.

### Primary author

Aurore Courtoy (IFPA, AGO Dpt., Universite de Liege)

### Co-authors

Alessandro Bacchetta (University of Pavia) Marco Radici (INFN, Sezione di Pavia)

### Presentation materials

 Proceedings Slides