Observation of [Lambda] b ^sup 0^ [arrow right][psi](2S)pK^sup -^ and [Lambda] b ^sup 0^ [arrow right]J/[psi][pi] ^sup +^ [pi] ^sup -^pK^sup -^ decays and a measurement of the [Lambda] b ^sup 0^ baryon mass

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) Abstract The decays [Lambda] b 0 [arrow right][psi](2S)pK- and [Lambda] b 0 [arrow right]J/ψπ + [pi] -pK- are observed in a data sample corresponding to an integrated luminosity of 3 fb-1, collected in proton-proton collisions at 7 and 8 TeV centre-of-mass energies by the LHCb detector. The [psi](2S) mesons are reconstructed through the decay modes [psi](2S) [arrow right] [mu]+[mu]- and [psi](2S) [arrow right] J/[psi][pi] + [pi] -. The branching fractions relative to that of [Lambda] b 0 [arrow right]J/[psi]pK- are measured to be ... where the first uncertainties are statistical, the second are systematic and the third is related to the knowledge of J/[psi] and [psi](2S) branching fractions. The mass of the [Lambda] b 0 baryon is measured to be ... where the uncertainties are statistical and systematic. [Figure not available: see fulltext.]