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  • Observation of the Decay Ξ_{b}^{-}→pK^{-}K^{-}
    Alkhazov, G; Aslanides, E; Babuschkin, I; Battista, V; Ben-Haim, E; Bettler, M-O; Bezshyiko, Ia; Blake, T; Blanc, F; Blouw, J; Boettcher, T; Bondar, A; Cadeddu, S; Carniti, P; Carson, L; Carvalho Akiba, K; Charles, M; Contu, A; Costa Sobral, C M; Couturier, B; De Cian, M; De Simone, P; Dettori, F; Ekelhof, R; Evans, H M; Fazzini, D; Ferguson, D; Ferro-Luzzi, M; Fiutowski, T; García Pardiñas, J; Grillo, L; Guz, Yu; Haefeli, G; He, J; Henrard, P; Humair, T; Hushchyn, M; Jiang, F; Johnson, D; Jones, C R; Jurik, N; Karacson, M; Kenzie, M; Ketel, T; Khanji, B; Klimaszewski, K; Koliiev, S; Kravchuk, L; Kruse, F; Kuonen, A K; Lanfranchi, G; Lefèvre, R; Li, T; Manning, P; Marin Benito, C; Massacrier, L M; Massafferri, A; Matteuzzi, C; Maurin, B; Meier, F; Mitzel, D S; Morgunova, O; Mulder, M; Nakada, T; Niet, R; Palombo, F; Pappalardo, L L; Penso, G; Petrov, A; Pinci, D; Pomery, G J; Popovici, B; Price, E; Rama, M; Rogozhnikov, A; Schlupp, M; Sciubba, A; Semennikov, A; Serrano, J; Shapkin, M; Shears, T; Sokoloff, M D; Spradlin, P; Stemmle, S; Stone, S; Swientek, K; Tobin, M; Tolk, S; Toriello, F; Ukleja, A; Valenti, G; Vazquez Gomez, R; Vitti, M; Voß, C; Waldi, R; Walsh, J; Wormser, G; Xu, Z; Yao, Y; Zavertyaev, M

    Physical review letters, 2017-Feb-17, Letnik: 118, Številka: 7
    Journal Article

    Decays of the Ξ_{b}^{-} and Ω_{b}^{-} baryons to the charmless final states ph^{-}h^{'-}, where h^{(')} denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies sqrts=7 and 8 TeV, corresponding to an integrated luminosity of 3  fb^{-1}. The decay Ξ_{b}^{-}→pK^{-}K^{-} is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξ_{b}^{-}→pK^{-}π^{-} decay. Results are reported, relative to the B^{-}→K^{+}K^{-}K^{-} normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Ξ_{b}^{-}→pK^{-}π^{-} and Ξ_{b}^{-}→pπ^{-}π^{-} relative to Ξ_{b}^{-}→pK^{-}K^{-} decays are also measured.

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