https://doi.org/10.1140/epjst/e2008-00780-1
New target transverse spin dependent azimuthal asymmetries from COMPASS experiment
1
Dipartimento di Fisica Generale, Università di Torino, Italy
2
INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino,
Italy
Corresponding author: bakur.parsamyan@cern.ch
In general, eight target transverse spin-dependent
azimuthal modulations are allowed in semi inclusive deep inelastic
scattering of polarized leptons on a transversely polarized target.
In the QCD parton model four of these asymmetries can be interpreted
within the leading order approach. Two of them, namely Collins and
Sivers effects were already measured by HERMES and COMPASS
experiments. Other two leading twist and remaining four azimuthal
asymmetries which can be interpreted as twist-three contributions
have been measured for the first time in COMPASS using a 160 GeV/c
longitudinally polarized (
) muon beam and a
transversely polarized 6LiD target. We present here the
preliminary results from the 2002–2004 data.
© EDP Sciences, Springer-Verlag, 2008
