The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model

Abstract

Elastic pi N scattering and the reaction pi+ p --> K+ Sigma+ are described simultaneously in a unitary coupled-channels approach which respects analyticity. SU(3) flavor symmetry is used to relate the t- and u-channel exchanges that drive the meson-baryon interaction in the different channels. Angular distributions, polarizations, and spin-rotation parameters are compared with available experimental data. The pole structure of the amplitudes is extracted from the analytic continuation.

43 pages, 15 figures, Version accepted for publication in Nuclear Physics A

References in corpus (14)

• Ab-initio Determination of Light Hadron Masses
• Extended Partial-Wave Analysis of piN Scattering Data
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• K^- p scattering length from scattering experiments
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• Extraction of Resonances from Meson-Nucleon Reactions
• Nucleon resonances in πN scattering up to energies \sqrt(s) < 2.0 GeV
• Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• The energy dependence of the pp->K+ n Sigma+ reaction close to threshold
• Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
• Pion-nucleon charge-exchange amplitudes above 2 GeV
• Resonance parameters from K-matrix and T-matrix poles

Cited by in corpus (12)

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• Scalar mesons moving in a finite volume and the role of partial wave mixing
• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• Relevance of complex branch points for partial wave analysis
• P-wave excited baryons from pion- and photo-induced hyperon production
• The internal structures of the nucleon resonances $N(1875)$ and $N(2120)$
• Role of the possible ${\Sigma }^{\ast }({\frac{1}{2}}^{-})$ state in the $\Lambda p\to \Lambda p{\pi }^0$ reaction
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Role of the ${\Delta }^{\ast }(1940)$ in the ${\pi }^{+}p\to K^{+}{\Sigma }^{+}(1385)$ and $pp\to n{K}^{+}{\Sigma }^{+}(1385)$ reactions
• Induced polarization of Λ(1116) in kaon electroproduction
• Decays of Pentaquarks in Hadrocharmonium and Molecular Pictures
• On eta photoproduction on the neutron and pi^0 eta photoproduction