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Study of the rare decays of B0 and B-0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.ORCID iD: 0000-0002-1253-8583
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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Number of Authors: 29182019 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 4, article id 098Article in journal (Refereed) Published
Abstract [en]

A study of the decays B0 s ! + and B0 ! + has been performed using 26 : 3 fb of 13TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in + invariant mass is comparable to the B0 s -B0 mass di ff erence, a single fi t determines the signal yields for both decay modes. This results in a measurement of the branching fraction B (B0 s ! +) = 3 : 2 +1:1 10 and an upper limit B (B0 ! +) < 4 : 3 10 at 95% con fi dence level. The result is combined with the Run 1 ATLAS result, yielding B (B0 s ! +) = 2 : 8 +0:8 10 and B (B0 ! +) < 2 : 1 10 at 95% con fi dence level. The combined result is consistent with the Standard Model prediction within 2.4 standard deviations in the B (B0 ! +)B (B0 s ! +) plane.

Place, publisher, year, edition, pages
SPRINGER , 2019. no 4, article id 098
Keywords [en]
Hadron-Hadron scattering (experiments)
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-383197DOI: 10.1007/JHEP04(2019)098ISI: 000465030500002OAI: oai:DiVA.org:uu-383197DiVA, id: diva2:1339135
Funder
Swedish Research CouncilEU, European Research CouncilEU, Horizon 2020
Note

For complete list of authors see http://dx.doi.org/10.1007/JHEP04(2019)098

Available from: 2019-07-25 Created: 2019-07-25 Last updated: 2019-07-25Bibliographically approved

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Asimakopoulou, Eleni M.Bergeås Kuutmann, ElinBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P. O. JoakimIsacson, MaxMårtensson, MikaelSales De Bruin, Pedro

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Asimakopoulou, Eleni M.Bergeås Kuutmann, ElinBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P. O. JoakimIsacson, MaxMårtensson, MikaelSales De Bruin, Pedro
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