Observation of Λb0 → ψ(2S)pK− and Λb0→ J/ψ π+ π− pK- decays and a measurement of the Λb0 baryon mass by Cheung, S, Evans, T, Gandini, P, Hadavizadeh, T, Harnew, N, Hill, D, Jalocha, P, John, M, Lupton, O, Malde, S, Nandi, A, Topp-Joergenson, S, Wilkinson, G, LHCb Collaboration (723 others)