Observation of the suppressed decay Λ b 0 → pπ - μ + μ -
The suppressed decay Λ b 0 → pπ - μ + μ -, excluding the J/ ψ and ψ(2 S) → μ + μ - resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb-1 collected with...
| Autores: | , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | 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:2445/186405 |
| Acceso en línea: | https://hdl.handle.net/2445/186405 |
| Access Level: | acceso abierto |
| Palabra clave: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| Sumario: | The suppressed decay Λ b 0 → pπ - μ + μ -, excluding the J/ ψ and ψ(2 S) → μ + μ - resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb-1 collected with the LHCb experiment. The Λ b 0 → pπ - μ + μ - branching fraction is measured relative to the Λ b 0 → J/ ψ(→ μ + μ -) pπ - branching fraction giving B({Λ}_b^0\to p{π}^{-/μ+{μ}-)}{B({Λ}_b^0\to J/ψ (\to {μ}+{μ}-)p{π}-)}=0.044± 0.012± 0.007, where the first uncertainty is statistical and the second is systematic. This is the first observation of a b → d transition in a baryonic decay. |
|---|