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Non-leptonic hyperon decays in chiral perturbation theory

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arxiv hep-ph/9805430 v1 pith:UASB2LMG submitted 1998-05-22 hep-ph

classification hep-ph
keywords chiralorderamplitudesconstantsdecayshyperonlow-energynon-leptonic
verification ladder T0 review T1 audit T2 compute T3 formal
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The non-leptonic hyperon decays are analyzed up to one-loop order including all counterterms in the framework of heavy baryon chiral perturbation theory. We use the exchange of the spin-3/2 decuplet resonances as an indication of which low-energy constants contribute significantly to these investigated processes . We choose four independent decay amplitudes that are not related by isospin relations in order to perform a fit for the pertinent low-energy constants and find a satisfactory fit both for s- and p-waves. The chiral corrections to the lowest order forms for the s-waves are moderate whereas there are significant modifications of the p-wave amplitudes.

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Cited by 2 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.

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