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arXiv · 1712.03830

Weak Decays of Doubly Heavy Baryons: Multi-body Decay Channels

Yu-Ji Shi·Wei Wang·Ye Xing·Ji Xu
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Abstract

The newly-discovered $Ξ_{cc}^{++}$ decays into the $ Λ_{c}^+ K^-π^+π^+$, 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 $Ξ_{cc}$, $Ω_{cc}$, $Ξ_{bc}$, $Ω_{bc}$, $Ξ_{bb}$ and $Ω_{bb}$, 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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Yu-Ji Shi, Wei Wang, Ye Xing, Ji Xu. 2017-12-08. Weak Decays of Doubly Heavy Baryons: Multi-body Decay Channels. https://doi.org/10.1140/epjc%2Fs10052-018-5532-7

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