Quark Model Explanation of the $N^{\ast }\to N\eta$ Branching Ratios

Abstract

The constituent quark model can explain the strong selectivity of the $N\eta$ decay branching ratios of the nucleon resonances if the fine structure interaction between the constituent quarks is described in terms of Goldstone boson exchange. This chiral quark model predicts that the resonances $N(1535)$, $N(1710)$, $\Lambda (1670)$, $\Sigma (1750)$, which have mixed flavor and spin symmetry $[21{]}_{FS}[21{]}_F[21{]}_S$ wavefunctions in lowest order, should have large $N\eta$ branching ratios, while $N\eta$ decay of the other resonances that have different flavor-spin symmetry should be strongly suppressed in agreement with the experimental branching ratios.

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References in corpus (1)

• Flavor and Spin Contents of the Nucleon in the Quark Model with Chiral Symmetry

Cited by in corpus (12)

• The Spectrum of the Nucleons and the Strange Hyperons and Chiral Dynamics
• Study of Non-Strange Baryon Resonances with Meson Photoproduction
• The $S_{11}-N$(1535) and $-N$(1650) Resonances in Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory
• A unitary model for meson-nucleon scattering
• Decays of Baryon Resonances into K Lambda, K^+ Sigma^0 and K^0 Sigma^+
• Light Baryons in a Constituent Quark Model with Chiral Dynamics
• Photoproduction of Baryons Decaying into N pi and N eta
• Strong decays of qqq baryons
• Photoproduction of $\eta$ mesons off neutrons from a deuteron target
• New data on $\vec{\gamma }\vec{p}\to \eta p$ with polarized photons and protons and their implications for $N^{\ast }\to N\eta$ decays
• Chiral corrections in hadron spectroscopy
• Influence of the axial anomaly on the decay $N(1535)\to N\eta$