Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 59, Issue 4, Pages 809-819Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-008-0833-x
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Funding
- Heisenberg-Landau
- Russian Foundation for Basic Research [06-02-16215]
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The target asymmetry for electroproduction of vector mesons is investigated within the handbag approach. While the generalized parton distribution (GPD) H is taken from a previous analysis of the electroproduction cross section, we here construct the GPD E from double distributions and constrain it by the Pauli form factors of the nucleon, positivity bounds and sum rules. Predictions for the target asymmetry are given for various vector mesons and it is discussed how experimental data on the asymmetry will further constrain E and what we may learn about the angular momenta the partons carry.
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