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.

arXiv comment18 pages, 14 figures, 4 tables Submitted to EPJA

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• Chiral constituent quark model study of the process $\gamma p\to \eta p$
• Fixed-t analyticity as a constraint in single energy partial wave analyses of meson photoproduction reactions
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• Differential cross sections and photon beam asymmetries of $\eta$ photoproduction on the proton at $E_{\gamma }$ = 1.3-2.4 GeV
• Effects of nucleon resonances on $\eta$ photoproduction off the neutron reexamined
• Eta and kaon production in a chiral quark model
• Energy dependent analysis of eta-meson photoproduction on protons and neutrons without background in the energy region up to 3.4 GeV
• Partial-wave analyses of $\gamma p\to \eta p$ \ and $\gamma n\to \eta n$ using a multichannel framework
• Amplitude- and truncated partial-wave analyses combined: A novel, almost theory-independent single-channel method for extracting photoproduction multipoles directly from measured data
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• Photoproduction of $\eta$ mesons off the proton for $1.2<E_{\gamma }<4.7$ GeV using CLAS at Jefferson Laboratory
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• The light speed vs the observer: the Kennedy-Thorndike test from GRAAL-ESRF
• New Narrow $N(1685)$ and $N(1726)$? Remarks on the Interpretation of the Neutron Anomaly as an Interference Phenomenon
• Truncated Partial-Wave Analysis for $\eta$-photoproduction observables via Bayesian Statistics
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• Regge Amplitudes for Two-to-Two Reactions
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• Exploration of hyperfine interaction between constituent quarks via eta productions