### Abstract

The rare baryonic decays Lb Lm+m and Lb Lg can complement rare B meson decays in constraining models of new physics. In this work, we calculate the relevant Lb-L transition form factors at leading order in heavy-quark effective theory using lattice QCD. Our analysis is based on RBC/UKQCD gauge field ensembles with 2+1 flavors of domain-wall fermions, and with lattice spacings of a-0:11 fm and a-0:08 fm. We compute appropriate ratios of three-point and two-point correlation functions for a wide range of source-sink separations, and extrapolate to infinite separation in order to eliminate excited-state contamination. We then extrapolate the form factors to the continuum limit and to the physical values of the light-quark masses.

Original language | English (US) |
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Article number | 106 |

Journal | Proceedings of Science |

Volume | Part F130497 |

Publication status | Published - 2012 |

Externally published | Yes |

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### ASJC Scopus subject areas

- General

### Cite this

_{b}→ Λ transitions from lattice QCD.

*Proceedings of Science*,

*Part F130497*, [106].