Longitudinal and transverse target-spin asymmetries associated with DVCS on the proton at HERMES
DESY, 15738, Zeuthen, Germany
* e-mail: Mikhail.Kopytin@desy.de
Accepted: 15 November 2006
Published online: 14 March 2007
Measurements of azimuthal cross-section asymmetries from deeply virtual Compton scattering on transversely and longitudinally polarized hydrogen and longitudinally polarized deuterium targets at HERMES are reported. By comparing the HERMES results on the transverse target-spin asymmetry with theoretical calculations based on a phenomenological model of generalized parton distributions, a model-dependent constraint on the total angular momentum carried by quarks in the nucleon is obtained.
PACS: 13.60.-r Photon and charged-lepton interactions with hadrons – / 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes – / 13.60.Fz Elastic and Compton scattering – / 13.88.+e Polarization in interactions and scattering –
© Società Italiana di Fisica and Springer-Verlag, 2007