Transverse target-spin asymmetry associated with DVCS on the proton and a resulting model-dependent constraint on the total angular momentum of quarks in the nucleon
Zhenyu Ye (on behalf of the HERMES collaboration)
TL;DR
This paper reports on measurements of transverse target-spin asymmetry in DVCS on the proton, providing a model-dependent constraint on quark angular momentum in the nucleon based on HERMES data and GPD models.
Contribution
It presents the first experimental measurement of the asymmetry and derives a new constraint on quark angular momentum using a phenomenological GPD model.
Findings
Measured transverse target-spin asymmetry in DVCS on the proton.
Derived a model-dependent constraint on quark total angular momentum.
Compared experimental results with GPD-based theoretical predictions.
Abstract
Results are reported on the transverse target-spin asymmetry associated with deeply virtual Compton scattering on the proton, extracted from the data accumulated by the HERMES experiment in the years 2002-2004. By comparing the HERMES results and theoretical predications 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.
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