NUK - logo
E-viri
Celotno besedilo
Odprti dostop
  • Improved limit on the branching fraction of the rare decay \(K^0_{\scriptscriptstyle S}\to\mu^+\mu^-\)
    collaboration, LHCb; P Alvarez Cartelle; Amhis, Y; Baesso, C; Barter, W; Bediaga, I; Bel, L J; Bertolin, A; Bifani, S; Borgheresi, A; M Calvo Gomez; Camboni, A; L Castillo Garcia; Cogan, J; Collins, P; Cook, A; Currie, R; Davis, A; De Serio, M; Dean, C T; Decamp, D; Dey, B; A Di Canto; Evans, T; Fazzini, D; Ferro-Luzzi, M; Fleuret, F; Fohl, K; J Fu; Färber, C; Gambetta, S; J Garra Tico; Gavardi, L; Gersabeck, M; Gligorov, V V; Graziani, G; Yu Guz; Hansmann-Menzemer, S; Henry, L; E van Herwijnen; Jiang, F; Johnson, D; Kandybei, S; Kariuki, J M; Kecke, M; Kenzie, M; Koppenburg, P; Kozeiha, M; Kucharczyk, M; Langenbruch, C; Lemaitre, F; Y Li; Z Li; Loh, D; M Lucio Martinez; Luo, H; Lupato, A; F Martinez Vidal; Merk, M; Morandin, M; Morello, M J; Morris, A B; Mulder, M; Neuner, M; Nieswand, S; O'Hanlon, D P; Ossowska, A; Otalora Goicochea, J M; Palano, A; Pellegrino, A; Pescatore, L; Pikies, M; Rodrigues, A B; Rogozhnikov, A; Roiser, S; P Ruiz Valls; D Sanchez Gonzalo; B Sanmartin Sedes; M -H Schune; Shevchenko, V; Simi, G; Skidmore, N; Skwarnicki, T; Smith, M; Stahl, M; Stone, S; Szumlak, T; Tisserand, V; Traill, M; R Vazquez Gomez; Venkateswaran, A; Vorobyev, A; Vorobyev, V; Wallace, C; Wang, J; Williams, T; Winn, M A; Z Xu; Yuan, X; Zhu, X

    arXiv.org, 10/2017
    Paper

    A search for the decay \(K^0_{\scriptscriptstyle S}\to\mu^+\mu^-\) is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb\(^{-1}\), collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of \({\cal B}(K^0_{\scriptscriptstyle S}\to\mu^+\mu^-) < 0.8~(1.0) \times 10^{-9}\) at \(90\%~(95\%)\) confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude.

Vnos na polico