The first observation of the Ξb0→J/ψΞ-π+ decay and the most precise measurement of the branching fraction of the Λb0→J/ψΞ-K+ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13\,TeV, corresponding to an integrated luminosity of 5.4\,fb-1. Using the Λb0→J/ψΛ and Ξb-→J/ψΞ- decays as normalisation channels, the ratios of branching fractions are measured to be (Formula presented.) where the first uncertainty is statistical and the second systematic.

Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays

Saitta B.;Provenzano D.;Oldeman R.;Manca G.;Litvinov R.;Fabiano F.;Dettori F.;De Angelis C.;
2025-01-01

Abstract

The first observation of the Ξb0→J/ψΞ-π+ decay and the most precise measurement of the branching fraction of the Λb0→J/ψΞ-K+ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13\,TeV, corresponding to an integrated luminosity of 5.4\,fb-1. Using the Λb0→J/ψΛ and Ξb-→J/ψΞ- decays as normalisation channels, the ratios of branching fractions are measured to be (Formula presented.) where the first uncertainty is statistical and the second systematic.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/463405
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