Observation of the decay Λb0 → χc1pπ−
The Cabibbo-suppressed decay Λ 0 b → χc1pπ − is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1 , collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ 0 b → χc2pπ − decay is also found. Usin...
| Autores: | , , , , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/185486 |
| Acesso em linha: | https://hdl.handle.net/2445/185486 |
| Access Level: | acceso abierto |
| Palavra-chave: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| Resumo: | The Cabibbo-suppressed decay Λ 0 b → χc1pπ − is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1 , collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ 0 b → χc2pπ − decay is also found. Using the Λ 0 b → χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be B Λ 0 b → χc1pπ − B Λ0 b → χc1pK− = (6.59 ± 1.01 ± 0.22) × 10−2 , B Λ 0 b → χc2pπ − B Λ0 b → χc1pπ− = 0.95 ± 0.30 ± 0.04 ± 0.04 , B Λ 0 b → χc2pK− B Λ0 b → χc1pK− = 1.06 ± 0.05 ± 0.04 ± 0.04 , where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2 → J/ψγ decays. Keywords: B physics, Branching fraction, Hadron-Hadron scattering (experiments), QCD, Quar |
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