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  • First observation of the decay $B_{s}^{0} \to K_{S}^{0} K^{}(892)^{0}
    Andrews, J. E; Appleby, R. B; Baesso, C; Barlow, R. J; Barsuk, S; Bondar, N; Borghi, S; Borsato, M; Cassina, L; Cavallero, G; Charpentier, Ph; Vidal, X. Cid; Ciezarek, G; Coco, V; Comerma-Montells, A; Coombes, M; De Paula, L; Deckenhoff, M; Dijkstra, H; Dorigo, M; Dreimanis, K; Egorychev, V; Fiorini, M; Fitzpatrick, C; Fiutowski, T; Fontanelli, F; Frei, C; Frosini, M; Gambetta, S; Tico, J. Garra; Göbel, C; Gomes, A; Graziani, G; Griffith, P; Grillo, L; Gushchin, E; Haen, C; Hansmann-Menzemer, S; Harnew, S. T; Harrison, J; Hombach, C; Jones, C. R; Jost, B; Jurik, N; Klaver, S; Klimaszewski, K; Koppenburg, P; Krocker, G; Kucharczyk, M; Kvaratskheliya, T; Latham, T; Lesiak, T; Liu, B; Longstaff, I; Märki, R; Matthieu, K; Milanes, D. A; Neubert, S; Nikodem, T; Onderwater, C. J. G; Otto, A; Oyanguren, A; Piucci, A; Popov, D; Pritchard, A; Pugatch, V; Navarro, A. Puig; Rakotomiaramanana, B; Rangel, M. S; Rihl, M; Rinnert, K; Robbe, P; Rodrigues, A. B; Romanovsky, V; Sagidova, N; Satta, A; Saunders, D. M; Schiller, M; Serra, N; Skillicorn, I; Soomro, F; Spradlin, P; Sridharan, S; Stenyakin, O; Sterpka, F; Teklishyn, M; Tolk, S; Tourneur, S; Gomez, R. Vazquez; Regueiro, P. Vazquez; Sierra, C. Vázquez; Vorobyev, V; Watson, N. K; Wiedner, D; Wilson, F. F; Witek, M; Wormser, G; Xie, Y; Zavertyaev, M; Zhang, L

    06/2015
    Journal Article

    Journal of High Energy Physics, 2016(1), 1-17 A search for $B_{(s)}^{0} \to K_{S}^{0} K^{*}(892)^{0}$ decays is performed using $pp$ collision data, corresponding to an integrated luminosity of $1.0~\text{fb}^{-1}$, collected with the LHCb detector at a centre-of-mass energy of $7~\text{TeV}$. The $B_{s}^{0} \to K_{S}^{0} K^{*}(892)^{0}$ decay is observed for the first time, with a significance of 7.1 standard deviations. The branching fraction is measured to be \begin{equation*} \mathcal{B}(B_{s}^{0} \to \bar{K}^{0} K^{*}(892)^{0}) + \mathcal{B}(B_{s}^{0} \to K^{0} \bar{K}^{*}(892)^{0}) = (16.4 \pm 3.4 \pm 2.3) \times 10^{-6},\\ \end{equation*} where the first uncertainty is statistical and the second is systematic. No evidence is found for the decay $B^{0} \to K_{S}^{0} K^{*}(892)^{0}$ and an upper limit is set on the branching fraction, $\mathcal{B}(B^{0} \to \bar{K}^{0} K^{*}(892)^{0}) + \mathcal{B}(B^{0} \to K^{0} \bar{K}^{*}(892)^{0}) < 0.96 \ \times 10^{-6}, $ at $90\,\% $ confidence level. All results are consistent with Standard Model predictions.

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