Coupled-channels study of the ${\pi }^{-}p\to \eta n$ process

Abstract

The reaction ${\pi }^{-}p\to \eta n$ is investigated within a dynamical coupled-channels model of meson production reactions in the nucleon resonance region. The meson baryon channels included are $\pi N$, $\eta N$, $\pi \Delta$, $\sigma N$, and $\rho N$. The non-resonant meson-baryon interactions of the model are derived from a set of Lagrangians by using a unitary transformation method. One or two excited nucleon states in each of $S$, $P$, $D$, and $F$ partial waves are included to generate the resonant amplitudes. Data of ${\pi }^{-}p\to \eta n$ reaction from threshold up to a total center-of-mass energy of about 2 GeV are satisfactorily reproduced and the roles played by the following nine nucleon resonances are investigated: $S_{11}(1535)$, $S_{11}(1650)$, $P_{11}(1440)$, $P_{11}(1710)$, $P_{13}(1720)$, $D_{13}(1520)$, $D_{13}(1700)$, $D_{15}(1675)$, and $F_{15}(1680)$. The reaction mechanism as well as the predicted $\eta N$ scattering length are discussed.

22 pages, 8 figures

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Cited by in corpus (34)

• Baryon spectroscopy
• Progress Toward Understanding Baryon Resonances
• Nucleon resonances within a dynamical coupled-channels model of pi N and gamma N reactions
• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Dynamical coupled-channels analysis of 1H(e,e'pi)N reactions
• Extraction of Resonances from Meson-Nucleon Reactions
• Dynamical coupled-channels study of pi N --> pi pi N reactions
• Photoproduction of $\eta$ mesons off neutrons from a deuteron target
• Interaction of eta mesons with nuclei
• Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial wave analysis
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• P-wave excited baryons from pion- and photo-induced hyperon production
• Study of $\eta$ photoproduction on the proton in a chiral constituent quark approach via one-gluon-exchange model
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Dynamical Models of the Excitations of Nucleon Resonances
• Results from the N* program at JLab
• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
• Eta-mesic nuclei: past, present, future
• Combined study of gamma p to eta p and pi-p to eta n in a chiral constituent quark approach
• Partial-wave analysis of π-p {\to} ηn and π-p {\to} K0Λ reactions
• A chiral quark model for meson electro-production in the S11 partial wave
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Toward establishing low-lying $\Lambda$ and $\Sigma$ hyperon resonances with the $\bar{K}+d\to \pi +Y+N$ reaction
• Combined analysis of the ${\pi }^{-}p\to K^0\Lambda$, $\eta n$ reactions in a chiral quark model
• Poles, the only true resonant-state signals, are extracted from a worldwide collection of partial wave amplitudes using only one, well controlled pole-extraction method
• Pairwise final state interactions in the p d --> p d eta reaction near threshold
• Insights into the pi- p -> eta n reaction mechanism
• Light-quark baryon spectroscopy within ANL-Osaka dynamical coupled-channels approach
• Single photo and electroproduction of pions at EBAC@JLAB
• Nuclear Reactions at Intermediate Energies