First study of the CP-violating phase and decay-width difference in Bs0 → ψ(2S)ϕ decays by Cheung, S, Evans, T, Gandini, P, Gruberg Cazon, B, Hadavizadeh, T, Harnew, N, Hill, D, Jalocha, P, John, M, Lupton, O, Malde, S, Nandi, A, Topp-Joergenson, S, Wilkinson, G, LHCb Collaboration (755 others)