Speaker
Adam Szabelski
(Universita e INFN, Trieste (IT))
Description
The Sivers function describes the correlation between the transverse spin of a nucleon and the trans-
verse motion of its partons. As such, a nonzero Sivers e?ect for gluons could be a signature of
their nonzero orbital angular momentum inside the nucleon. COMPASS has collected data of semi-
inclusive deep inelastic scattering by impinging 160 GeV=c muons on transversely polarised proton
and deuteron targets. The gluon Sivers asymmetry is extracted from a high-pT hadron pair sample
with the use of monte carlo simulations and the a neural network approach. The results of a similar
analysis for a Collins-like asymmetry for gluons will also be given.
Author
Adam Szabelski
(Universita e INFN, Trieste (IT))
