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arXiv · 2601.02990

Hyperon neutrinoless double beta decays in chiral perturbation theory

Zi-Ying Zhao·Ze-Rui Liang·Feng-Kun Guo·Li-Ping He·De-Liang Yao
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Abstract

We study the neutrinoless double beta decays of spin-1/2 hyperons, $B_1^- \to B_2^+ \ell^- \ell^-$ with $B_1^-\in \{\Sigma^-,\Xi^-\}$ and $B_2^+\in\{p,\Sigma^+\}$, which violate lepton number by two units. The decay amplitudes are computed within covariant baryon chiral perturbation theory at the one-loop level. Dalitz plots of the squared amplitude for six physical decay processes are presented in this proceeding, while a detailed numerical analysis will be presented in a forthcoming publication.

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Zi-Ying Zhao, Ze-Rui Liang, Feng-Kun Guo, Li-Ping He, De-Liang Yao. 2026-01-06. Hyperon neutrinoless double beta decays in chiral perturbation theory. https://arxiv.org/abs/2601.02990

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