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  • Model-Independent Evidence for J/ψp Contributions to Λ_{b}^{0}→J/ψpK^{-} Decays
    Ali, S; Alves, A A; Baesso, C; Beddow, J; Bedeschi, F; Bediaga, I; Bellee, V; Betti, F; van Beuzekom, M; Bifani, S; Borisyak, M; Borsato, M; Bozzi, C; Brodzicka, J; Bursche, A; Carniti, P; Couturier, B; Cowan, G A; Currie, R; D'Ambrosio, C; Dean, C-T; Di Canto, A; Durante, P; Elsasser, Ch; Ely, S; Frank, M; Gomes, A; Griffith, P; Grillo, L; Haines, S C; Henry, L; Hicheur, A; Hill, D; Hongming, L; Hushchyn, M; Idzik, M; Jaeger, A; Jalocha, J; Johnson, D; Karacson, M; Karbach, T M; Khurewathanakul, C; Kolpin, M; Kurek, K; Lai, A; Lemaitre, F; Leverington, B; Liu, B; Longstaff, I; Maev, O; Manca, G; Marchand, J F; Marconi, U; Marino, P; Marks, J; Martin, M; Mathad, A; Mazurov, A; Meissner, M; Minard, M-N; Morandin, M; Morello, M J; Muheim, F; Müller, K; Mussini, M; Needham, M; Nikitin, N; Pappalardo, L L; Patel, M; Perazzini, S; Plo Casasus, M; Poluektov, A; Puig Navarro, A; Raven, G; Richards, S; Rihl, M; Romero Vidal, A; Saborido Silva, J J; Salustino Guimaraes, V; Sanmartin Sedes, B; Sarti, A; Schael, S; Schindler, H; Sciubba, A; Serrano, J; Shapkin, M; Stoica, S; Tomassetti, L; Topp-Joergensen, S; Tsaregorodtsev, A; Velthuis, J J; Wallace, R; Wang, J; Williams, M; Wraight, K; Xie, Y; Xu, Z; Yin, H; Zhang, Y; Zheng, Y

    Physical review letters, 2016-Aug-19, Letnik: 117, Številka: 8
    Journal Article

    The data sample of Λ_{b}^{0}→J/ψpK^{-} decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3  fb^{-1}, is inspected for the presence of J/ψp or J/ψK^{-} contributions with minimal assumptions about K^{-}p contributions. It is demonstrated at more than nine standard deviations that Λ_{b}^{0}→J/ψpK^{-} decays cannot be described with K^{-}p contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for P_{c}^{+}→J/ψp charmonium-pentaquark states in the same data sample.

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