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η Photoproduction on the Proton for Photon Energies from 0.75 to 1.95 GeV

Dugger, M.
Biselli, Angela
CLAS Collaboration

Publication date

January 2002

Publisher

DigitalCommons@Fairfield

Language

English

Abstract

Differential cross sections for γp→ηp have been measured with tagged real photons for incident photon energies from 0.75 to 1.95 GeV. Mesons were identified by missing mass reconstruction using kinematical information for protons scattered in the production process. The data provide the first extensive angular distribution measurements for the process above W=1.75 GeV. Comparison with preliminary results from a constituent quark model support the suggestion that a third S11 resonance with mass ~1.8 GeV couples to the ηN channel

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