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Observation of $ \Lambda_b^0 \to \psi(2S)pK^-$ and $ \Lambda_b^0 \to J/\psi \pi^+ \pi^- pK^-$ decays and a measurement of the $\Lambda_b^0$ baryon mass

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Academic year: 2021

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Figure 1: Mass distributions of selected (left) Λ 0 b → ψ(2S)[→ µ + µ − ]pK − and (right) Λ 0 b → J / ψ pK − candidates
Table 1: Signal yields of Λ 0 b decay channels. Uncertainties are statistical only.
Table 3: Systematic uncertainties (in %) on the ratios of branching fractions R ψ(2S) and R J /ψ π + π −
Figure 3: (left) Mass distribution of selected Λ 0 b → ψ(2S)[→ J / ψ π + π − ]pK − candidates with an additional constraint for the ψ(2S) mass [33]

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