[en] We report on the extraction of dihadron fragmentation functions (DiFF) from the semiinclusive 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; Universita di Pavia > Dipartimento de Fisica
Radici, Marco; INFN > Sezione di Pavia
Language :
English
Title :
Status on the transversity parton distribution: the dihadron fragmentation functions way
Publication date :
2012
Event name :
6th International Conference on Quarks and Nuclear Physics (QNP 2012)