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The role of resonances in non-leptonic hyperon decays

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arxiv hep-ph/9902351 v1 pith:EQ5UCQKI submitted 1999-02-15 hep-ph

classification hep-ph
keywords resonancesdecayseffectivehyperonnon-leptonictheoryachievedagreement
verification ladder T0 review T1 audit T2 compute T3 formal
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We examine the importance of resonances for the non-leptonic hyperon decays in the framework of chiral perturbation theory. Lower lying resonances are included into the effective theory. Integrating out the heavy degrees of freedom in the resonance saturation scheme generates higher order counterterms in the effective Lagrangian, providing an estimate of the pertinent coupling constants. A fit to the eight independent decay amplitudes that are not related by isospin symmetry is performed and reasonable agreement for both s- and p- waves is achieved.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hyperon non-leptonic decays in relativistic Chiral Perturbation Theory with resonances

    hep-ph 2026-04 unverdicted novelty 7.0 of 10

    Relativistic ChPT at NLO with resonance saturation yields a good combined fit to hyperon non-leptonic s- and p-wave decay amplitudes.

  2. $|\Delta I|=3/2$ non-leptonic hyperon decays in covariant baryon chiral perturbation theory

    hep-ph 2026-08 conditional novelty 4.0 of 10

    In covariant baryon chiral perturbation theory, decuplet-baryon contributions with the consistent coupling scheme, plus pion loops, most improve the fit to the |ΔI|=3/2 hyperon decay amplitudes.

  3. Kinetic Mixing and Axial Charges in the Parity-Doublet Model

    hep-ph 2025-12 unverdicted novelty 4.0 of 10

    Kinetic mixing terms are introduced in the parity-doublet model to reproduce the empirical axial charge g_A ≈ 1.28 of the nucleon along with masses of the nucleon and N*(1535).

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