Branching ratios for hyperon semi-invisible decays (hadronic ~10^{-5}, radiative <10^{-7}) are calculated with sizable one-loop corrections using effective Lagrangians.
Weak Decays of Doubly Heavy Baryons: Multi-body Decay Channels
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abstract
The newly-discovered $\Xi_{cc}^{++}$ decays into the $ \Lambda_{c}^+ K^-\pi^+\pi^+$, but the experimental data has indicated that this decay is not saturated by any two-body intermediate state. In this work, we analyze the multi-body weak decays of doubly heavy baryons $\Xi_{cc}$, $\Omega_{cc}$, $\Xi_{bc}$, $\Omega_{bc}$, $\Xi_{bb}$ and $\Omega_{bb}$, in particular the three-body nonleptonic decays and four-body semileptonic decays. We classify various decay modes according to the quark-level transitions and present an estimate of the typical branching fractions for a few golden decay channels. Decay amplitudes are then parametrized in terms of a few SU(3) irreducible amplitudes. With these amplitudes, we find a number of relations for decay widths, which can be examined in future.
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hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
pQCD plus flavor symmetry yields O(10^{-5}) branching ratios for selected B to baryon + dark baryon decays in Type-I and Type-II scenarios.
citing papers explorer
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Semi-invisible Hyperon Decays in the Effective Lagrangian Approach
Branching ratios for hyperon semi-invisible decays (hadronic ~10^{-5}, radiative <10^{-7}) are calculated with sizable one-loop corrections using effective Lagrangians.
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B Meson Semi-Invisible Decays via Perturbative QCD
pQCD plus flavor symmetry yields O(10^{-5}) branching ratios for selected B to baryon + dark baryon decays in Type-I and Type-II scenarios.