Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abhayasinghe, DK;
Abidi, SH;
... Zwalinski, L; + view all
(2019)
Study of the rare decays of B_{s}^{0} and B^{0} mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector.
Journal of High Energy Physics
(4)
, Article 98. 10.1007/JHEP04(2019)098.
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Abstract
A study of the decays B_{s}^{0} → μ⁺μ⁻ and B_{0} → μ⁺μ⁻ has been performed using 26.3 fb⁻¹ of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in μ⁺μ⁻ invariant mass is comparable to the B_{s}^{0} - B^{0} mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction Β (B^{0} → μ⁺μ⁻) < 4.3 x 10⁻¹⁰ at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding Β (B_{s}^{0} → μ⁺μ⁻) = (2.8_{-0.7}^{+0.8}) x 10⁻⁹ and Β (B^{0} → μ⁺μ⁻) < 2.1 x 10⁻¹⁰ at 95% confidence level. The combined result is consistent with the Standard Model prediction within 2.4 standard deviations in the B (B^{0} → μ⁺μ⁻) - Β (B_{s}^{0} → μ⁺μ⁻) plane.
| Type: | Article |
|---|---|
| Title: | Study of the rare decays of B_{s}^{0} and B^{0} mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP04(2019)098 |
| Publisher version: | http://doi.org/10.1007/JHEP04(2019)098 |
| Language: | English |
| Additional information: | © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0). |
| Keywords: | Hadron-Hadron scattering (experiments) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10073664 |
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