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arXiv · hep-ph/0601138

Transversity GPD in photo- and electroproduction of two vector mesons

R. Enberg·B. Pire·L. Szymanowski
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Abstract

The chiral-odd generalized parton distribution (GPD), or transversity GPD, of the nucleon can be accessed experimentally through the photo- or electroproduction of two vector mesons on a polarized nucleon target, γ^(*) N --> ρ_1 ρ_2 N', where ρ_1 is produced at large transverse momentum, ρ_2 is transversely polarized, and the mesons are separated by a large rapidity gap. We predict the cross section for this process for both transverse and longitudinal ρ_{2} production. To this end we propose a model for the transversity GPD H_T(x,ξ,t), and give an estimate of the relative sizes of the transverse and longitudinal ρ_{2} cross sections. We show that a dedicated experiment at high energy should be able to measure the transversity content of the proton.

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R. Enberg, B. Pire, L. Szymanowski. 2006-03-16. Transversity GPD in photo- and electroproduction of two vector mesons. https://doi.org/10.1140/epjc%2Fs2006-02545-3

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