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  • Evidence for the decay BS0→K¯∗0μ+μ− $$ {B}_S^0\to {\overline{K}}^{\ast 0}{\mu}^{+}{\mu}^{-}
    J. Albrecht; G. Alkhazov; P. Alvarez Cartelle; S. Amerio; V. Batozskaya; N. Belloli; K. Belous; I. Belyaev; G. Bencivenni; A. Berezhnoy; S. Blusk; T. Boettcher; S. Borghi; H. Cai; G. Casse; R. Cenci; S.-G. Chitic; P. Ciambrone; E. Cogneras; B. Couturier; A. Crocombe; L. De Paula; P. De Simone; A. Dendek; J. M. Durham; S. Eidelman; U. Eitschberger; T. Fiutowski; F. Fontanelli; J. García Pardiñas; C. Gaspar; G. Graziani; R. Greim; T. Gys; M. Hecker; L. Henry; W. Hu; D. Hutchcroft; M. John; M. Karacson; F. Keizer; M. Kolpin; W. Kucewicz; G. Lanfranchi; C. Langenbruch; C. Lazzeroni; P.-R. Li; A. Lusiani; V. Macko; K. Maguire; T. Maltsev; G. Manca; C. Matteuzzi; A. McNab; A. Merli; G. Morello; M. Needham; T. D. Nguyen; R. Oldeman; P. Owen; A. Oyanguren; M. Pappagallo; G. Passaleva; M. Pepe Altarelli; P. Perret; M. Pikies; I. Polyakov; R. Quagliani; B. Rachwal; I. Raniuk; S. Reichert; V. Renaudin; J. A. Rodriguez Lopez; S. Roiser; A. Romero Vidal; M. H. Schune; J. Serrano; B. G. Siddi; N. Skidmore; l. Soares Lavra; M. Stahl; U. Straumann; M. J. Tilley; V. Tisserand; L. Tomassetti; M. Traill; A. Tully; N. Tuning; P. Vazquez Regueiro; J. J. Velthuis; J. V. Viana Barbosa; M. Vieites Diaz; H. Viemann; V. Volkov; A. Vollhardt; C. Voß; J. Wang; J. Wicht; G. Wilkinson; J. Yu

    The journal of high energy physics, 07/2018, Letnik: 2018, Številka: 7
    Journal Article

    Abstract A search for the decay BS0→K¯∗0μ+μ− $$ {B}_S^0\to {\overline{K}}^{\ast 0}{\mu}^{+}{\mu}^{-} $$ is presented using data sets corresponding to 1.0, 2.0 and 1.6 fb−1 of integrated luminosity collected during pp collisions with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. An excess is found over the background-only hypothesis with a significance of 3.4 standard deviations. The branching fraction of the BS0→K¯∗0μ+μ− $$ {B}_S^0\to {\overline{K}}^{\ast 0}{\mu}^{+}{\mu}^{-} $$ decay is determined to be ℬBs0→K¯∗0μ+μ−=2.9±1.0stat±0.2syst±0.3norm×10−8 $$ \mathrm{\mathcal{B}}\left({B}_s^0\to {\overline{K}}^{\ast 0}{\mu}^{+}{\mu}^{-}\right)=\left2.9\pm 1.0\left(\mathrm{stat}\right)\pm 0.2\left(\mathrm{syst}\right)\pm 0.3\left(\mathrm{norm}\right)\right\times {10}^{-8} $$, where the first and second uncertainties are statistical and systematic, respectively. The third uncertainty is due to limited knowledge of external parameters used to normalise the branching fraction measurement.

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