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Transversity in exclusive vector-meson leptoproduction
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The role of transversity or helicity-flip generalized parton distributions (GPDs) in leptoproduction of vector mesons is investigated within the framework of the handbag approach. The transversity GPDs in combination with twist-3 meson wave functions, occur in the amplitudes for transitions from a transversely polarized virtual photon to a longitudinal polarized vector meson. The importance of the transversity GPDs can be examined in some of the spin density matrix elements and in transverse target spin asymmetries. Using suitable parametrizations of both helicity-flip and non-flip GPDs, which are essentially taken from our previous papers, we estimate these observables and compare the results with available data.
Forward citations
Cited by 2 Pith papers
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Nucleon tensor form factors at large $N_{c}$
In the pion mean-field picture at large Nc, the nucleon tensor charge and anomalous tensor magnetic moment are valence dominated, while the tensor quadrupole moment is sea dominated and strongly enhanced near the chir...
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Exclusive leptoproduction of a light vector meson at the twist-3 in a GTMD framework
Exclusive light vector meson production is formulated at twist-3 in a CGC/GTMD framework, giving all helicity amplitudes including transverse meson polarization without endpoint singularities.
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