The first observation of the decays Λ_b^0→χ_c1pK^- and Λ_b^0→χ_c2pK^- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb^-1, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λ_b^0→χ_c1pK^-)/B(Λ_b^0→J/ψpK^-)=0.242±0.014±0.013±0.009,B(Λ_b^0→χ_c2pK^-)/B(Λ_b^0→J/ψpK^-)=0.248±0.020±0.014±0.009,B(Λ_b^0→χ_c2pK^-)/B(Λ_b^0→χ_c1pK^-)=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χ_c1→J/ψγ and χ_c2→J/ψγ decays. Using both decay modes, the mass of the Λ_b^0 baryon is also measured to be m_Λ_b^0=5619.44±0.28...
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported us...
The first observation of the decays Λ0b → χc1 p K− and Λ0b → χc2 p K− is reported using a data sampl...
See paper for full list of authors - All figures and tables, along with any supplementary material a...
The first observation of the decays Λ_b^0→χ_c1pK^- and Λ_b^0→χ_c2pK^- is reported using a data sampl...
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported us...
The first observation of the decays $Λ_{b}^{0}→χ_{c1}pK^{-}$ and $Λ_{b}^{0}→χ_{c2}pK^{-}$ is reporte...
The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corres...
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported us...
The first observation of the decays Λ0b → χc1 p K− and Λ0b → χc2 p K− is reported using a data sampl...
See paper for full list of authors - All figures and tables, along with any supplementary material a...
The first observation of the decays Λ_b^0→χ_c1pK^- and Λ_b^0→χ_c2pK^- is reported using a data sampl...
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported us...
The first observation of the decays $Λ_{b}^{0}→χ_{c1}pK^{-}$ and $Λ_{b}^{0}→χ_{c2}pK^{-}$ is reporte...
The first observation of the decays Λb0→χc1pK- and Λb0→χc2pK- is reported using a data sample corres...
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported us...
The first observation of the decays Λ0b → χc1 p K− and Λ0b → χc2 p K− is reported using a data sampl...
See paper for full list of authors - All figures and tables, along with any supplementary material a...