[en] We report on the extraction of dihadron fragmentation functions (DiFF) 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 π+π− pairs is related to the transverse polarization of fragmenting quarks through a significant polarized DiFF. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process ep↑ → e′(π+π−)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization.
Disciplines :
Physics
Author, co-author :
Courtoy, Aurore ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Bacchetta, Alessandro
Radici, Marco
Language :
English
Title :
Interference Fragmentation Functions and Transverse Spin Studies.
Publication date :
2012
Event name :
20th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2012)
Event place :
Bonn, Germany
Event date :
26-30 March 2012
Audience :
International
Commentary :
Published on the DESY webpage: http://www-library.desy.de/preparch/desy/proc/proc12-02.html
