Résumé du preprint Irfu-08-15

Irfu-08-15
Collins and Sivers Transverse Spin Asymmetries for Pions and Kaons on Deuterons
P. Alekseev et al (Compass collaboration)
The measurements of the Collins and Sivers asymmetries of identi ed hadrons produced in deep-inelastic scattering of 160 GeV/c muons on a transversely polarised 6LiD target at COMPASS are presented. The results for charged pions and charged and neutral kaons correspond to all data available, which were collected from 2002 to 2004. For all nal state particles both the Collins and Sivers asymmetries turn out to be small, compatible with zero within the statistical errors, in line with the previously published results for not identi ed charged hadrons, and with the expected cancellation between the u- and d-quark contributions