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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/186410
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation
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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.
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CAMBONI, Alessandro, et al. Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation. Journal of High Energy Physics. 2017. Vol. 2017, num. 108, pags. 1-17. ISSN 1126-6708. [consulted: 8 of June of 2026]. Available at: https://hdl.handle.net/2445/186410