Can the total angular momentum of u-quarks in the nucleon be accessed at HERMES?
F. Ellinghaus, W. -D. Nowak, A. V. Vinnikov, Z. Ye
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 Ju 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 Ju from zero to 0.4 corresponds to a 4σ(2σ) difference in the calculated transverse target-spin asymmetry in deeply virtual Compton scattering (rho0 electroproduction), where σis the total experimental uncertainty.
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