The gluon Sivers asymmetry measurements at COMPASS

Apr 12, 2016, 3:20 PM
SR4a (DESY Hamburg)


DESY Hamburg

Spin Physics WG6 Spin Physics


Mr Adam Szabelski (University of Trieste)


The Sivers effect describes the correlation between the spin of the nucleon and the orbital motion of partons. For gluons it has been measured at COMPASS via $J/\Psi$ production and via high-$p_T$ hadron pair production in Semi-Inclusive Deep Inelastic Scattering of a 160 GeV/$c$ muon beam off transversely polarised proton and deuteron targets by determining the amplitude of the modulation of the Sivers angle $\phi^{Siv}$ distribution. Both the approach using $J/\Psi$ channel and high-$p_T$ hadron pair selection will be described in detail and the results given.

Primary author

Mr Adam Szabelski (University of Trieste)

Presentation materials