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)

Lecture Hall, Institute for Physical Chemistry

University of Bonn

Spin physics 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