Eta photoproduction in a combined analysis of pion- and photon-induced reactions

Abstract

The $\eta N$ final state is isospin-selective and thus provides access to the spectrum of excited nucleons without being affected by excited $\Delta$ states. To this end, the world database on eta photoproduction off the proton up to a center-of-mass energy of $E\sim 2.3$ GeV is analyzed, including data on differential cross sections, and single and double polarization observables. The resonance spectrum and its properties are determined in a combined analysis of eta and pion photoproduction off the proton together with the reactions $\pi N\to \pi N$, $\eta N$, $K\Lambda$ and $K\Sigma$. For the analysis, the so-called Jülich coupled-channel framework is used, incorporating unitarity, analyticity, and effective three-body channels. Parameters tied to photoproduction and hadronic interactions are varied simultaneously. The influence of recent MAMI $T$ and $F$ asymmetry data on the eta photoproduction amplitude is discussed in detail.

21 pages, 10 figures. Updated to the published version

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• Big-Bang Nucleosynthesis
• Extended Partial-Wave Analysis of piN Scattering Data
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Study of the gp-->etap reaction with the Crystal Ball detector at the Mainz Microtron(MAMI-C)
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• Measurement of eta photoproduction on the proton from threshold to 1500 MeV
• Measurement of the beam asymmetry in eta-photoproduction off the proton
• Gauge-invariant approach to meson photoproduction including the final-state interaction
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Further evidence for N(1900)P_{13} from photoproduction of hyperons
• Relevance of complex branch points for partial wave analysis
• Measurement of the transverse target and beam-target asymmetries in $\eta$ meson photoproduction at MAMI
• Nucleon resonances in πN scattering up to energies \sqrt(s) < 2.0 GeV
• Origin of the second peak in the cross section of the $K^{+}\Lambda$ photoproduction
• Pole positions and residues from pion photoproduction using the Laurent+Pietarinen expansion method
• The piN --> etaN data demand the existence of N(1710) P11 resonance reducing the 1700 MeV continuum ambiguity
• Production of $\eta$ and ${\eta }^{\prime }$ Mesons on Nucleons and Nuclei
• Pion-nucleon charge-exchange amplitudes above 2 GeV
• Pole structure from energy-dependent and single-energy fits to $\pi N$ elastic scattering data
• Amplitude extraction in pseudoscalar-meson photoproduction: towards a situation of complete information

Cited by in corpus (26)

• Three-body Unitarity with Isobars Revisited
• Light Baryon Spectroscopy
• Strong evidence for nucleon resonances near 1900\,MeV
• Light baryon resonances from a coupled-channel study including $\mathbf{K\Sigma }$ photoproduction
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Model Selection for Pion Photoproduction
• Differential Cross Section Measurements for $\gamma n\to {\pi }^{-}p$ Above the First Nucleon Resonance Region
• A simple alternative to the Breit-Wigner distribution
• An Altarelli Cocktail for the MiniBooNE Anomaly?
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Observation of the $p{\eta }^{\prime }$ Cusp in the New Precise Beam Asymmetry $\Sigma$ Data for $\gamma p\to p\eta$
• Resonances in heavy meson - heavy baryon coupled-channel interactions
• Pentaquark components in low-lying baryon resonances
• $N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy
• Extracting the pole and Breit-Wigner properties of nucleon and $\Delta$ resonances from the $\gamma N\to K\Sigma$ photoproduction
• The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach
• Differential cross sections and photon beam asymmetries of $\eta$ photoproduction on the proton at $E_{\gamma }$ = 1.3-2.4 GeV
• Two-body wave functions and compositeness from scattering amplitudes: II. Application to the physical $N^{\ast }$ and ${\Delta }^{\ast }$ resonances
• Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
• Single-energy partial wave analysis for pion photoproduction with fixed-t analyticity
• Application of the single-channel, single-energy AA/PWA method to $K^{+}\Lambda$ photoproduction
• Is the pole content of each single-energy, single-channel partial wave analysis inherently model dependent?
• Single-channel, single-energy partial-wave analysis with continuity improved through minimal phase constraints
• Double polarisation experiments in meson photoproduction
• Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach
• New graphical criterion for the selection of complete sets of polarization observables and its application to single-meson photoproduction as well as electroproduction