Evidence for the two-body charmless baryonic decay {B}+\to p\overline{Λ}
A search for the rare two-body charmless baryonic decay {B}+\to p\overline{Λ} is performed with pp collision data, corresponding to an integrated luminosity of 3 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of {B}+\to p\overline{Λ} candidates with respe...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/186425 |
| Acceso en línea: | https://hdl.handle.net/2445/186425 |
| 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: | A search for the rare two-body charmless baryonic decay {B}+\to p\overline{Λ} is performed with pp collision data, corresponding to an integrated luminosity of 3 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of {B}+\to p\overline{Λ} candidates with respect to background expectations is seen with a statistical significance of 4.1 standard deviations, and constitutes the first evidence for this decay. The branching fraction, measured using the B + → K S 0 π + decay for normalisation, is {B}({B}+\to p\overline{Λ})=(2.{4}_{-0.8}^{+1.0}± 0.3)× 1{0}^{-7}, where the first uncertainty is statistical and the second systematic. |
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