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Title: | Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
Author: | Camboni, Alessandro Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Graciani Diaz, Ricardo Marin Benito, Carla Picatoste Olloqui, E. Rives Molina, V. Alfonso Albero, Alejandro Calvo Gomez, M. Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | Jun-2017 |
Publisher: | Springer Verlag |
Abstract: | A search for CP violation in the decay Λ b 0 → pK - μ + μ - is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb-1. The Λ b 0 → pK - μ + μ - decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, Δ A_{CP}≡ A_{CP}({Λ}_b^0\to p{K}-{μ}+{μ}-)-{A}_{CP}({Λ}_b^0\to p{K}-J/ψ ) and a {a}_{CP}^{\widehat{T}- odd} , where the latter is based on asymmetries in the angle between the μ + μ - and pK - decay planes. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP06(2017)108 |
It is part of: | Journal of High Energy Physics, 2017, vol. 2017, num. 108, p. 1-17 |
URI: | http://hdl.handle.net/2445/186410 |
Related resource: | https://doi.org/10.1007/JHEP06(2017)108 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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