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Probing Transversity in Electroproduction of Two Vector Mesons

D. Yu. Ivanov·B. Pire·L. Szymanowski·O. V. Teryaev
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Abstract

Electroproduction of two vector mesons with a large rapidity gap between them provides the first feasible selective access to chiral-odd GPDs. The scattering amplitude of the process $ γ^* N \to ρ_L^0 ρ_T^+ N'$ may be represented as a convolution of an impact factor describing the $γ^* \to ρ_L^0$ transition and an amplitude describing the $N\to ρ_T^+ N'$ transition, analogously to deeply exclusive electroproduction of a meson, the virtual photon being replaced by a Pomeron. The production of a transversely polarized vector meson $ρ_T^+$ selects a chiral-odd GPD in the proton.

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D. Yu. Ivanov, B. Pire, L. Szymanowski, O. V. Teryaev. 2004-01-21. Probing Transversity in Electroproduction of Two Vector Mesons. https://arxiv.org/abs/hep-ph/0401157

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