TY - JOUR
T1 - Transversity and Collins functions from SIDIS and e+e- data
AU - Anselmino, M.
AU - Boglione, M.
AU - D'Alesio, U.
AU - Kotzinian, A.
AU - Murgia, F.
AU - Prokudin, A.
AU - Türk, C.
PY - 2007/3/30
Y1 - 2007/3/30
N2 - A global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and in e+e-→h1h2X processes, from the Belle Collaboration, is performed. It results in the extraction of the Collins fragmentation function and, for the first time, of the transversity distribution function for u and d quarks. These turn out to have opposite signs and to be sizably smaller than their positivity bounds. Predictions for the azimuthal asymmetry AUTsin(S+h), as will soon be measured at JLab and COMPASS operating on a transversely polarized proton target, are then presented.
AB - A global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and in e+e-→h1h2X processes, from the Belle Collaboration, is performed. It results in the extraction of the Collins fragmentation function and, for the first time, of the transversity distribution function for u and d quarks. These turn out to have opposite signs and to be sizably smaller than their positivity bounds. Predictions for the azimuthal asymmetry AUTsin(S+h), as will soon be measured at JLab and COMPASS operating on a transversely polarized proton target, are then presented.
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U2 - 10.1103/PhysRevD.75.054032
DO - 10.1103/PhysRevD.75.054032
M3 - Article
AN - SCOPUS:34047097363
SN - 1550-7998
VL - 75
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 054032
ER -