出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 p+p 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" ! e0(p+p)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization.
