Coupling strength of the $N^{\ast }(1535)S_{11}$ to the $K^{+}\Lambda$ channel

Abstract

The $N^{\ast }(1535)S_{11}$ coupling strength to the $K^{+}\Lambda$ channel, $g_{N^{\ast }(1535)\Lambda K^{+}}$, is extracted from the latest and largest $K^{+}\Lambda$ photoproduction database by using an isobar model. It is found that the coupling is small. In term of the coupling ratio the best result is $R\equiv |g_{N^{\ast }(1535)\Lambda K^{+}}/g_{N^{\ast }(1535)\eta p}|=0.460\pm 0.172$, much smaller than that obtained from the isobar analysis of the $J/\psi$ decays, i.e., $1.3\pm 0.3$, but consistent with the results of the unitary chiral approach of the same decay processes as well as the partial wave analysis of kaon photoproduction, i.e., $R=0.5\sim 0.7$. The different results of $R$ found here and in literature to date suggest that a more solid definition of the coupling constant, especially in the case of $N^{\ast }(1535)S_{11}$ state, is urgently required, before a fair comparison can be made.

11 pages, 5 figures, 1 table

References in corpus (10)

• Chiral dynamics of the S11(1535) and S11(1650) resonances revisited
• Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda
• Kaon photoproduction in a multipole approach
• Bayesian inference of the resonance content of p(gamma,K^+)Lambda
• Electromagnetic production of kaon near threshold
• Origin of the second peak in the cross section of the $K^{+}\Lambda$ photoproduction
• Analysis of the consistency of kaon photoproduction data with Lambda in the final state
• Role of the $N^{\ast }$(1535) in the $J/\psi \to \bar{p}\eta p$ and $J/\psi \to \bar{p}{K}^{+}\Lambda$ reactions
• Are hyperon resonances required in the elementary $K^{+}\Lambda$ photoproduction?
• Comment on "Mass and KΛCoupling of the N*(1535)"

Cited by in corpus (9)

• Photoproduction of $K\Lambda$ on the proton
• Photo- and electroproduction of $K^{+}\Lambda$ with unitarity-restored isobar model
• Review of the low-lying excited baryons ${\Sigma }^{\ast }(1/2^{-})$
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Role of the $N^{\ast }(1535)$ in the ${\Lambda }_c^{+}\to {\bar{K}}^0\eta p$ decay
• Coupled $K^{+}\Lambda$ and $K^0\Lambda$ photoproduction off the nucleon: Consequences from the recent CLAS and MAMI data and the $N(1680)P_{11}$ narrow state
• Extracting the pole and Breit-Wigner properties of nucleon and $\Delta$ resonances from the $\gamma N\to K\Sigma$ photoproduction
• Nucleon resonances in the $\gamma p\to \varphi K^{+}\Lambda$ reaction near threshold
• Nucleon resonances in the ${\pi }^{-}p\to K^0\Lambda$ reaction near threshold