Speaker
Aram Kotzinian
(INFN Torino)
Description
In semi-inclusive DIS of polarized leptons on a transversely polarized target
eight azimuthal modulations appear in the cross-section. Within QCD parton
model four azimuthal asymmetries can be interpreted at leading order, two of
them being the already measured Collins and Sivers asymmetries. The other two
leading twist asymmetries, related to different transverse momentum dependent
quark distribution functions, and also additional four asymmetries which can
be interpreted as twist-three contributions have been measured from the
COMPASS data, using a 160 GeV/c longitudinally polarized muon beam and a
transversely polarized ^6LiD target. The preliminary results from the
2002-2004 data are presented here for the first time.
Primary author
Aram Kotzinian
(INFN Torino)
