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Measurement of $\eta$ photoproduction on the proton from threshold to 1500 MeV

Abstract : Beam asymmetry and differential cross section for the reaction gamma+p->eta+p were measured from production threshold to 1500 MeV photon laboratory energy. The two dominant neutral decay modes of the eta meson, eta->2g and eta->3pi0, were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.
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http://hal.in2p3.fr/in2p3-00163478
Contributor : Suzanne Robert <>
Submitted on : Tuesday, July 17, 2007 - 3:42:47 PM
Last modification on : Thursday, November 19, 2020 - 12:58:50 PM

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O. Bartalini, V. Bellini, J.P. Bocquet, P. Calvat, M. Capogni, et al.. Measurement of $\eta$ photoproduction on the proton from threshold to 1500 MeV. European Physical Journal A, EDP Sciences, 2007, 33, pp.169-184. ⟨10.1140/epja/i2007-10439-9⟩. ⟨in2p3-00163478⟩

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