Event calendar file
2-7 June 2016
Auditorium Maximum
Europe/Warsaw timezone
14th International Workshop on Meson Production, Properties and Interaction
Auditorium Maximum
-
Medium lecture hall (A)
Exclusive $\omega$ meson production at COMPASS
Collaboration
COMPASS
Abstract content
The COMPASS collaboration has measured exclusively produced $\omega$ mesons in muon proton scattering using a transversely polarised NH$_3$ target. Five single-spin and three double-spin azimuthal asymmetries in the cross section were determined in the kinematic region 1 to 10 (GeV/c)$^2$ of photon virtuality, 0.003 to 0.3 of Bjorken-x and 0.05 to 0.5 GeV/c of $\omega$ squared transverse momentum. The asymmetries are sensitive to nucleon-helicity flip GPDs $E^f$ that are related to orbital angular momentum of flavour $f$ quarks, to chiral-odd GPDs $H_T^f$ that are related to transversity PDFs, and also to the sign of the $\pi \omega$ transition form factor. The results are compared to recent calculations of a GPD-based model.
