Observation of Λ b 0  → ψ(2S)pK− and Λ b 0  → J/ψπ + π −pK− decays and a measurement of the Λ b 0 baryon mass

Observation of Λ b 0  → ψ(2S)pK− and Λ b 0  → J/ψπ + π −pK− decays and a measurement of the Λ b 0 baryon mass