Can the total angular momentum of u-quarks in the nucleon be accessed at HERMES?
arXiv:hep-ph/0506264 · doi:10.1140/epjc/s2006-02529-3
Abstract
We investigate the possibility to acquire information on the generalized parton distribution E and, through a model for E, also on the u-quark total angular momentum J_u by studying deeply virtual Compton scattering and hard exclusive rho0 electroproduction on a transversely polarized hydrogen target at HERMES. It is found that a change in J_u from zero to 0.4 corresponds to a 4Ï(2Ï) difference in the calculated transverse target-spin asymmetry in deeply virtual Compton scattering (rho0 electroproduction), where Ïis the total experimental uncertainty.
10 pages, 9 figures