Analysis of recent eta photoproduction data

Abstract

Recent data on eta-meson photoproduction off a proton target in the energy range 2 < sqrt{s} < 3 GeV are analyzed with regard to their overall consistency. Results from the ELSA and CLAS measurements are compared with predictions of a Regge model whose reaction amplitude was fixed via a global fit to pre-2000 measurements of differential cross sections and polarization observables for gamma p -> eta p at higher energies. We find that all recent experimental results on differential cross sections for eta-meson photoproduction are in good agreement with each other, except for the CLAS data from 2009. However, the latter can be made consistent with the other data at the expense of introducing an energy-dependent renormalization factor. We point out that there indications in the data for a possible excitation of baryon resonances with masses around 2.1 and 2.4 GeV.

13 pages, 13 figures; small modifications in the text, some figures are improved, accepted for publication by Eur. Phys. J. A

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• Extended Partial-Wave Analysis of piN Scattering Data
• Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model
• Photoproduction of eta mesons off protons for photon energies from 0.75 GeV to 3 GeV
• Photoproduction of $\eta$ and $\eta \prime$ Mesons off Protons
• pi N --> eta N and eta N --> eta N partial wave T-matrices in a coupled, three channel model
• New results on the Roper resonance and the P_{11} partial wave
• Differential cross sections for the reactions gamma p-> p eta and gamma p -> p eta-prime
• Quasi-free photoproduction of eta-mesons of the neutron
• Antiproton-proton partial-wave analysis below 925 MeV/c
• Branching Fractions for psi(2S) to J/psi Transitions
• Analysis of the consistency of kaon photoproduction data with Lambda in the final state
• Systematic Regge theory analysis of omega photoproduction
• The piN --> etaN data demand the existence of N(1710) P11 resonance reducing the 1700 MeV continuum ambiguity
• Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
• Neutral pion photoproduction at high energies
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Backward pion-nucleon scattering
• Backward pion photoproduction
• Primakoff effect in eta-photoproduction off protons
• Measurement of the D+ --> K*0bar l+ nu_l Branching Fraction

Cited by in corpus (11)

• Progress Toward Understanding Baryon Resonances
• Eta-meson production in the resonance energy region
• Combined analysis of eta' production reactions: gamma N -> eta' N, N N -> N N eta', and pi N -> eta' N
• Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• Finite-Energy Sum Rules in Eta Photoproduction off the Nucleon
• P-wave excited baryons from pion- and photo-induced hyperon production
• Regge phenomenology in ${\pi }^0$ and $\eta$ photoproduction
• Fixed-t analyticity as a constraint in single energy partial wave analyses of meson photoproduction reactions
• Photoproduction of $\eta$ mesons off the proton for $1.2<E_{\gamma }<4.7$ GeV using CLAS at Jefferson Laboratory
• Triality selection rules of Octonion and Quantum Mechanics