Observation of the decay Λ0b → χc1pπ−
The Cabibbo-suppressed decay Λ0b → 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 Λ0b → χc2pπ− decay is also found. Using the Λ...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3085 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3085 https://doi.org/10.1007/JHEP05(2021)095 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Interaccions d'hadrons Partícules (Física nuclear) Protons 539 |
| Sumario: | The Cabibbo-suppressed decay Λ0b → 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 Λ0b → χc2pπ− decay is also found. Using the Λ0b → χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be: B(Λ0b→χc1pπ−)B(Λ0b→χc1pK−)= 6.59±1.01±0.22)×10−2 B(Λ0b→χc2pπ−)B(Λ0b→χc1pπ−)= 0.95±0.30±0.04±0.04 B(Λ0b→χc2pK−)B(Λ0b→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. |
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