Evidence for the decay BS0→K¯∗0 μ+ μ−
Abstract: A search for the decay B0 s → K ∗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...
| Authors: | , , , , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2018 |
| Country: | España |
| Institution: | Universidad de Barcelona |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/185384 |
| Online Access: | https://hdl.handle.net/2445/185384 |
| Access Level: | Open access |
| Keyword: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| Summary: | Abstract: A search for the decay B0 s → K ∗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 B0 s → K ∗0 µ +µ − decay is determined to be B(B0 s → K ∗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. |
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