Study of the rare decays of Bs0 and B 0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

The ATLAS collaboration

doi:10.1007/JHEP04(2019)098

Study of the rare decays of B_s⁰ and B ⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

The ATLAS collaboration

National University of Science and Technology POLITEHNICA Bucharest
National Center for Energy, Nuclear Science and Technology
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia
NOVA University Lisbon
CERN
Mohamed I University
Aix-Marseille Université
University of Oklahoma
University of Massachusetts
Azerbaijan National Academy of Sciences
IN2P3/CNRS
Royal Holloway University of London
University of Toronto
University of Copenhagen
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
The University of Tokyo
Johannes Gutenberg University Mainz
AGH University of Krakow
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
Istanbul University
Rutherford Appleton Laboratory
University of California at Santa Cruz
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
IFT-UAM/CSIC
Joint Institute for Nuclear Research
University of Rome Tor Vergata
Kyoto University
Lund University
University of Geneva
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
University of Bologna
University of Victoria BC
Universidad Nacional de La Plata
Radboud University Nijmegen
Horia Hulubei National Institute of Physics and Nuclear Engineering
Humboldt University of Berlin
National Technical University of Athens

Research output: Contribution to journal › Article › peer-review

167 Scopus citations

Abstract

A study of the decays B_s⁰ → 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_s⁰-B⁰ mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction ℬ(Bs0→μ+μ−)=(3.2−1.0+1.1)×10−9 and an upper limit ℬ (B→ μ⁺μ⁻) < 4.3 × 10 ^{− 10} at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding ℬ(Bs0→μ+μ−)=(2.8−0.7+0.8)×10−9 and ℬ (B→ 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(Bs0→μ+μ−) plane.[Figure not available: see fulltext.]

Original language	English
Article number	98
Journal	Journal of High Energy Physics
Volume	2019
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2019)098
State	Published - Apr 1 2019

Keywords

Hadron-Hadron scattering (experiments)

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10.1007/JHEP04(2019)098

Cite this

@article{6e3532b478864156bddcbae627ee2737,

title = "Study of the rare decays of Bs0 and B 0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector",

abstract = "A study of the decays Bs0 → 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 Bs0-B0 mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction ℬ(Bs0→μ+μ−)=(3.2−1.0+1.1)×10−9 and an upper limit ℬ (B→ μ+μ−) < 4.3 × 10 − 10 at 95\% confidence level. The result is combined with the Run 1 ATLAS result, yielding ℬ(Bs0→μ+μ−)=(2.8−0.7+0.8)×10−9 and ℬ (B→ 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(Bs0→μ+μ−) plane.[Figure not available: see fulltext.]",

keywords = "Hadron-Hadron scattering (experiments)",

author = "\{The ATLAS collaboration\} and M. Aaboud and G. Aad and B. Abbott and Abbott, \{D. C.\} and O. Abdinov and B. Abeloos and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and S. Adachi and L. Adam and L. Adamczyk and L. Adamek and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and \{Alconada Verzini\}, \{M. J.\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and D. Alexandre and T. Alexopoulos and M. Alhroob and H. Arnold and \{Da Via\}, C. and V. Dao and J. Hobbs and J. Jia and G. Piacquadio and D. Tsybychev",

note = "Publisher Copyright: {\textcopyright} 2019, The Author(s).",

year = "2019",

month = apr,

day = "1",

doi = "10.1007/JHEP04(2019)098",

language = "English",

volume = "2019",

journal = "Journal of High Energy Physics",

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T1 - Study of the rare decays of Bs0 and B 0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

AU - The ATLAS collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abbott, D. C.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adam, L.

AU - Adamczyk, L.

AU - Adamek, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexandre, D.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Arnold, H.

AU - Da Via, C.

AU - Dao, V.

AU - Hobbs, J.

AU - Jia, J.

AU - Piacquadio, G.

AU - Tsybychev, D.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - A study of the decays Bs0 → 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 Bs0-B0 mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction ℬ(Bs0→μ+μ−)=(3.2−1.0+1.1)×10−9 and an upper limit ℬ (B→ μ+μ−) < 4.3 × 10 − 10 at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding ℬ(Bs0→μ+μ−)=(2.8−0.7+0.8)×10−9 and ℬ (B→ 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(Bs0→μ+μ−) plane.[Figure not available: see fulltext.]

AB - A study of the decays Bs0 → 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 Bs0-B0 mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction ℬ(Bs0→μ+μ−)=(3.2−1.0+1.1)×10−9 and an upper limit ℬ (B→ μ+μ−) < 4.3 × 10 − 10 at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding ℬ(Bs0→μ+μ−)=(2.8−0.7+0.8)×10−9 and ℬ (B→ 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(Bs0→μ+μ−) plane.[Figure not available: see fulltext.]

KW - Hadron-Hadron scattering (experiments)

UR - https://www.scopus.com/pages/publications/85064541986

U2 - 10.1007/JHEP04(2019)098

DO - 10.1007/JHEP04(2019)098

M3 - Article

AN - SCOPUS:85064541986

SN - 1126-6708

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 98

ER -

Study of the rare decays of B_s⁰ and B ⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

Abstract

Keywords

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