Relativistic ChPT at NLO with resonance saturation yields a good combined fit to hyperon non-leptonic s- and p-wave decay amplitudes.
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The paper proposes capturing all ΔI=1/2-enhanced isospin-breaking effects on ε' via QCD+QED lattice simulations limited to photons with energies 0.5-2.0 GeV, with a ChPT estimate placing the low-energy contribution at ~0.5%.
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Hyperon non-leptonic decays in relativistic Chiral Perturbation Theory with resonances
Relativistic ChPT at NLO with resonance saturation yields a good combined fit to hyperon non-leptonic s- and p-wave decay amplitudes.
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Isospin breaking corrections to a lattice QCD calculation of $\varepsilon'$
The paper proposes capturing all ΔI=1/2-enhanced isospin-breaking effects on ε' via QCD+QED lattice simulations limited to photons with energies 0.5-2.0 GeV, with a ChPT estimate placing the low-energy contribution at ~0.5%.