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

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arxiv 1009.3781 v2 pith:EG7SCEN5 submitted 2010-09-20 nucl-th

M. Döring , C. Hanhart , F. Huang , S. Krewald , U.-G. Mei{ss}ner , D. Rönchen This is my paper · ORCID
classification nucl-th
keywords coupled-channelsreactionsigmaunitaryamplitudesanalyticanalyticityangular
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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.

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  1. Possibility of the antibottom-strange molecular pentaquarks near $ B\Sigma$ and $ B^*\Sigma$ thresholds

    hep-ph 2026-07 conditional novelty 5.0 of 10

    Coupled-channel OBE dynamics with S–D mixing produce three near-threshold poles dominated by BΣ/B*Σ that should show as narrow enhancements in open Bs0N, BΛ and B*Λ channels.

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