We present an update of a previous global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and ill e(+)e(-) --> h(1)h(2)X processes, front the Belle Collaboration. Compared to the first extraction, a more precise determination of the Collins fragmentation function and the transversity distribution function for u and d quarks is obtained.
Update on transversity and Collins functions from SIDIS and e+ e- data
D'ALESIO, UMBERTO;MELIS, STEFANO
2009-01-01
Abstract
We present an update of a previous global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and ill e(+)e(-) --> h(1)h(2)X processes, front the Belle Collaboration. Compared to the first extraction, a more precise determination of the Collins fragmentation function and the transversity distribution function for u and d quarks is obtained.
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