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arXiv · hep-ph/9504253

Strong Isospin Mixing Effects on the Extraction of $ΔI=3/2$ Non-Leptonic Hyperon Decay Amplitudes

Kim Maltman
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Abstract

The existence of isospin admixtures in the physical $Λ$, $π^o$ complicates the extraction of Delta I=3/2 non-leptonic hyperon decay amplitudes from experimental data, allowing contributions associated with large Delta I=1/2 amplitudes to appear in the (nominally) Delta I=3/2 amplitudes obtained ignoring these admixtures. We show how to correct for this effect to leading order in $(m_d-m_u)$ and extract the true Delta I=3/2 amplitudes. The resulting corrections are modest ($<25\%$) for s-waves, but extremely large, $\simeq 100\%$ and $\simeq 400\%$ for $Λ$ and $Ξ$ p-waves, respectively.

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Kim Maltman. 1995-04-07. Strong Isospin Mixing Effects on the Extraction of $ΔI=3/2$ Non-Leptonic Hyperon Decay Amplitudes. https://doi.org/10.1016/0370-2693(94)01601-8

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