Study of the Rare Decays of B{_{s}⁰} and B⁰ Mesons into Muon Pairs Using Data Collected during 2015 and 2016 with the ATLAS Detector

dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAaboud, M.
dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D. C.
dc.contributor.authorAbdinov, O.
dc.contributor.authorAbeloos, B.
dc.contributor.authorAbhayasinghe, D. K.
dc.contributor.authorIzen, Joseph M.
dc.contributor.authorMeirose, Bernhard
dc.contributor.authorReeves, Kendall
dc.contributor.authorATLAS Collaboration
dc.contributor.utdAuthorIzen, Joseph M.
dc.contributor.utdAuthorMeirose, Bernhard
dc.contributor.utdAuthorReeves, Kendall
dc.date.accessioned2019-10-25T21:48:11Z
dc.date.available2019-10-25T21:48:11Z
dc.date.created2019-04-15
dc.description.abstractA study of the decays B{_{s}⁰} → μ⁺μ⁻ and B⁰ → 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} -B⁰ mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction ℬ(B{_{s}⁰} → μ+μ−) = (3.2 _{−1.0} ^{+1.1}) × 10⁻⁹ and an upper limit ℬ (B⁰ → μ⁺μ⁻) < 4.3 × 10⁻¹⁰ at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding ℬ(B{_{s}⁰} → μ+μ−)=(2.8{_{−0.7} ^{+0.8}}) × 10⁻⁹ and ℬ (B⁰→ μ⁺μ⁻) < 2.1 × 10⁻¹⁰ at 95% confidence level. The combined result is consistent with the Standard Model prediction within 2.4 standard deviations in the ℬ(B⁰ → μ⁺μ⁻)−ℬ(B{_{s}⁰} → μ⁺μ⁻) plane. © 2019 CERN, for the ATLAS Collaboration
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.identifier.bibliographicCitationAaboud, M., G. Aad, B. Abbott, D. C. Abbott, et al. 2019. "Study of the rare decays of B{_{s}⁰} and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector." Journal of High Energy Physics 2019(4): art. 098, doi: 10.1007/JHEP04(2019)098
dc.identifier.issn1126-6708
dc.identifier.issue4
dc.identifier.urihttps://hdl.handle.net/10735.1/7041
dc.identifier.volume2019
dc.language.isoen
dc.publisherSpringer Verlag
dc.relation.urihttps://dx.doi.org/10.1007/JHEP04(2019)098
dc.rightsCC BY 4.0 (Attribution)
dc.rights©2019 CERN, for the ATLAS Collaboration
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.source.journalJournal of High Energy Physics
dc.subjectHadrons--Scattering
dc.subjectProton-proton interactions
dc.subjectBranching fractions (Nuclear physics)
dc.subjectStandard model (Nuclear physics)
dc.titleStudy of the Rare Decays of B{_{s}⁰} and B⁰ Mesons into Muon Pairs Using Data Collected during 2015 and 2016 with the ATLAS Detector
dc.type.genrearticle

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