Sign ambiguity in the K Sigma channel

Abstract

Ambiguities of the signs of $N\to \Sigma K$ coupling constants are studied in a multichannel partial wave analysis of a large body of pion and photo-induced reactions. It is shown that the signs are not free from some ambiguities, and further experimental data are needed. Data on the reactions ${\pi }^{+}p\to {\Sigma }^{+}{K}^{+}$ and $\gamma p\to K^{+}{\Sigma }^0$ define rather well the isospin 3/2 contributions to these channels. However the lack of information on polarization observables for the reactions ${\pi }^{-}p\to {\Sigma }^0{K}^0$, ${\pi }^{-}p\to {\Sigma }^{-}{K}^{+}$ and $\gamma p\to K^0{\Sigma }^{+}$ does not allow us to fix uniquely the signs of $N\to \Sigma K$ coupling constants. As a consequence, also the contributions of nucleon resonances to these channels remain uncertain.

8 pages, 12 figures

References in corpus (15)

• Extended Partial-Wave Analysis of piN Scattering Data
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Nucleon resonances within a dynamical coupled-channels model of pi N and gamma N reactions
• Restoration of chiral and $U(1{)}_A$ symmetries in excited hadrons
• Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6 GeV
• eta-photoproduction in the resonance energy region
• Dynamical Coupled-Channels Effects on Pion Photoproduction
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ photoproduction with fine center-of-mass energy resolution
• Nucleon resonance decay by the $K^0{\Sigma }^{+}$ channel
• Dynamical coupled-channels study of pi N --> pi pi N reactions
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• P-wave excited baryons from pion- and photo-induced hyperon production
• Measurement of the g p -> K^0 Sigma^+ reaction with the Crystal Ball/TAPS detectors at the Mainz Microtron
• Transverse Polarization of ${\Sigma }^{+}(1189)$ in Photoproduction on a Hydrogen Target in CLAS

Cited by in corpus (8)

• High statistics study of the reaction $\gamma p\to p{\pi }^0\eta$
• Photocouplings at the Pole from Pion Photoproduction
• High statistics study of the reaction $\gamma p\to p2{\pi }^0$
• Light baryon resonances from a coupled-channel study including $\mathbf{K\Sigma }$ photoproduction
• Energy-independent PWA of the reaction $\gamma p\to K^{+}\Lambda$
• Double-polarization observable G in neutral-pion photoproduction off the proton
• $N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy
• Eta and kaon production in a chiral quark model