Evidence for the decay {B}_S^0\to {\overline{K}}^{\ast 0}{μ}+{μ}-
Abstract
A search for the decay {B}_S^0\to {\overline{K}}^{\ast 0}{μ}+{μ}- 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 {B}_S^0\to {\overline{K}}^{\ast 0}{μ}+{μ}- decay is determined to be \mathrmB({B}_s^0\to {\overline{K}}^{\ast 0}{μ}+{μ}-)=[2.9± 1.0(stat)± 0.2(syst)± 0.3(norm)]× {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.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- July 2018
- DOI:
- 10.1007/JHEP07(2018)020
- arXiv:
- arXiv:1804.07167
- Bibcode:
- 2018JHEP...07..020A
- Keywords:
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- B physics;
- FCNC Interaction;
- Flavor physics;
- Hadron-Hadron scattering (experiments);
- Rare decay;
- High Energy Physics - Experiment
- E-Print:
- All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-004.html