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  • Model-Independent Observation of Exotic Contributions to B^{0}→J/ψK^{+}π^{-} Decays
    Adeva, B; Audurier, B; Bay, A; Bel, L J; Benson, S; Berezhnoy, A; Bjørn, M; Bursche, A; Cadeddu, S; Calabrese, R; Campora Perez, D H; Cattaneo, M; Cenci, R; Chatzikonstantinidis, G; Ciezarek, G; Contu, A; Cowan, G A; de Vries, J A; Dembinski, H-P; Dufour, L; Eidelman, S; Ely, S; Ene, A; Falabella, A; Ferreira Lopes, L; Frei, C; Gazzoni, G; Gerstel, D; Gibson, V; Gironella Gironell, P; Gizdov, K; Gligorov, V V; Grabowski, J P; Gu, C; Gushchin, E; Gys, T; Hansmann-Menzemer, S; Harrison, T; Henry, L; Hidalgo Charman, R; Hilton, M; Hopchev, P H; Hushchyn, M; Idzik, M; Ivshin, K; Jashal, B K; Karacson, M; Kim, K E; Klimkovich, T; Kopecna, R; Lesiak, T; Lindner, R; Lupato, A; Luppi, E; Lusiani, A; Malde, S; Marino, P; Meadows, B; Michielin, E; Milanes, D A; Minzoni, L; Müller, J; Murphy, C H; Naik, P; Palutan, M; Pepe Altarelli, M; Pikies, M; Pili, M; Pinzino, J; Placinta, V; Poli Lener, M; Popov, D; Qian, W; Qin, J; Rademacker, J H; Ratnikov, F; Ricciardi, S; Ruf, T; Saur, M; Schmidt, B; Schubiger, M; Sestini, L; Smeaton, J G; Soares Lavra, L; Stone, S; Szymanski, M; Tilley, M J; Tolk, S; Tsaregorodtsev, A; Valenti, G; Vázquez Sierra, C; Vecchi, S; Vieira, D; Wang, Y; Ward, D R; Williams, M R J; Xu, M; Yin, H; Zhu, X; Zucchelli, S

    Physical review letters, 2019-Apr-19, 20190419, Letnik: 122, Številka: 15
    Journal Article

    An angular analysis of B^{0}→J/ψK^{+}π^{-} decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3  fb^{-1} collected with the LHCb detector. The m(K^{+}π^{-}) spectrum is divided into fine bins. In each m(K^{+}π^{-}) bin, the hypothesis that the three-dimensional angular distribution can be described by structures induced only by K^{*} resonances is examined, making minimal assumptions about the K^{+}π^{-} system. The data reject the K^{*}-only hypothesis with a large significance, implying the observation of exotic contributions in a model-independent fashion. Inspection of the m(J/ψπ^{-}) vs m(K^{+}π^{-}) plane suggests structures near m(J/ψπ^{-})=4200 and 4600 MeV.

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