### Abstract

We present the first measurements of absolute branching fractions of Ξc _{0} decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e-collider. We first measure the absolute branching fraction for B-→Λ̄c-Ξc _{0} using a missing-mass technique; the result is B(B-→Λ̄c-Ξc _{0} )=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc _{0} )B(Ξc _{0} →Ξ-π+), B(B-→Λ̄c-Ξc _{0} )B(Ξc _{0} →ΛK-π+), and B(B-→Λ̄c-Ξc _{0} )B(Ξc _{0} →pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc _{0} yields the following branching fractions: B(Ξc _{0} →Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc _{0} →ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc _{0} →pK-K-π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξc _{0} →Ξ-π+) can be combined with Ξc _{0} branching fractions measured relative to Ξc _{0} →Ξ-π+ to yield other absolute Ξc _{0} branching fractions.

Original language | English |
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Article number | 082001 |

Journal | Physical Review Letters |

Volume | 122 |

Issue number | 8 |

DOIs | |

Publication status | Published - 2019 Feb 25 |

### ASJC Scopus subject areas

- Physics and Astronomy(all)

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## Cite this

_{0}Baryon at Belle

*Physical Review Letters*,

*122*(8), [082001]. https://doi.org/10.1103/PhysRevLett.122.082001