The first observation of the Xib0->J/PsiXi-pi+ decay and the most precise measurement of the branching fraction of the Lambdab0->J/PsiXi-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 Lambdab0->J/PsiLambda and Xib- ->J/PsiXi- 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 Lambdab0 -> J/PsiXi-K+ and Xib0->J/PsiXi-pi+ decays
Riccardi D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Kleijne N.Membro del Collaboration Group
;Bassi G.Membro del Collaboration Group
;
2025
Abstract
The first observation of the Xib0->J/PsiXi-pi+ decay and the most precise measurement of the branching fraction of the Lambdab0->J/PsiXi-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 Lambdab0->J/PsiLambda and Xib- ->J/PsiXi- 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.File in questo prodotto:
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