Can the total angular momentum of u-quarks in the nucleon be accessed at HERMES?
Department of Physics, University of Colorado, Boulder, Colorado, 80309-0390, USA
2 DESY, 15738, Zeuthen, Germany
3 BLTP JINR, 141980, Dubna, Moscow region, Russia
4 DESY, 22603, Hamburg, Germany
* e-mail: firstname.lastname@example.org
Revised: 17 February 2006
Published online: 31 March 2006
We investigate the possibility of acquiring information on the generalized parton distribution E and, through a model for E, also on the u-quark total angular momentum Ju by studying deeply virtual Compton scattering and hard exclusive ρ0 electroproduction on a transversely polarized hydrogen target at HERMES. It is found that a change in Ju from zero to 0.4 corresponds to a 4σ (2σ) difference in the calculated transverse target-spin asymmetry in deeply virtual Compton scattering (ρ0 electroproduction), where σ is the total experimental uncertainty.
© Springer-Verlag, 2006