Study of the rare decays of Bs0                          and B0                          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 B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

The ATLAS collaboration

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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(B_s⁰ → 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_s⁰→ 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_s⁰→ μ⁺μ⁻) plane.

Original language	English
Article number	98
Pages (from-to)	1-46
Number of pages	47
Journal	Journal of High Energy Physics
Volume	2019
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2019)098
Publication status	Published - Apr 2019
Externally published	Yes

Bibliographical note

Copyright the Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Hadron-Hadron scattering (experiments)

Access to Document

10.1007/JHEP04(2019)098Licence: CC BY

Publisher version (open access)Final published version, 912 KBLicence: CC BY

Cite this

@article{13eb644e43614b0d8923b07454eb92cd,

title = "Study of the rare decays of Bs0 and B0 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 (B0 → 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 (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(Bs0 → μ+μ−) plane.",

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 B. Ali and G. Alimonti and J. Alison and Alkire, {S. P.} and C. Allaire and Allbrooke, {B. M.M.} and Allen, {B. W.} and Allport, {P. P.} and A. Aloisio and A. Alonso and F. Alonso and C. Alpigiani and Alshehri, {A. A.} and Alstaty, {M. I.} and {Alvarez Gonzalez}, B. and {{\'A}lvarez Piqueras}, D. and Alviggi, {M. G.} and Amadio, {B. T.} and {Amaral Coutinho}, Y. and A. Ambler and L. Ambroz and C. Amelung and D. Amidei and {Amor Dos Santos}, {S. P.} and S. Amoroso and Amrouche, {C. S.} and F. An and C. Anastopoulos and Ancu, {L. S.} and N. Andari and T. Andeen and Anders, {C. F.} and Anders, {J. K.} and Anderson, {K. J.} and A. Andreazza and V. Andrei and Anelli, {C. R.} and S. Angelidakis and I. Angelozzi and A. Angerami and Anisenkov, {A. V.} and A. Annovi and C. Antel and Anthony, {M. T.} and M. Antonelli and Antrim, {D. J.A.} and F. Anulli and M. Aoki and {Aparisi Pozo}, {J. A.} and {Aperio Bella}, L. and G. Arabidze and Araque, {J. P.} and {Araujo Ferraz}, V. and {Araujo Pereira}, R. and Arce, {A. T.H.} and Ardell, {R. E.} and Arduh, {F. A.} and Arguin, {J. F.} and S. Argyropoulos and Arling, {J. H.} and Armbruster, {A. J.} and Armitage, {L. J.} and A. Armstrong and O. Arnaez and H. Arnold and M. Arratia and O. Arslan and A. Artamonov and G. Artoni and S. Artz and S. Asai and N. Asbah and Asimakopoulou, {E. M.} and L. Asquith and K. Assamagan and R. Astalos and Atkin, {R. J.} and M. Atkinson and Atlay, {N. B.} and K. Augsten and G. Avolio and R. Avramidou and Ayoub, {M. K.} and Azoulay, {A. M.} and G. Azuelos and Baas, {A. E.} and Baca, {M. J.} and H. Bachacou and K. Bachas and M. Backes and P. Bagnaia and M. Bahmani and H. Bahrasemani and Bailey, {A. J.} and Bailey, {V. R.} and Baines, {J. T.} and M. Bajic and C. Bakalis and Baker, {O. K.} and Bakker, {P. J.} and {Bakshi Gupta}, D. and S. Balaji and Baldin, {E. M.} and P. Balek and F. Balli and Balunas, {W. K.} and J. Balz and E. Banas and A. Bandyopadhyay and S. Banerjee and Bannoura, {A. A.E.} and L. Barak and Barbe, {W. M.} and Barberio, {E. L.} and D. Barberis and M. Barbero and T. Barillari and Barisits, {M. S.} and J. Barkeloo and T. Barklow and R. Barnea and Barnes, {S. L.} and Barnett, {B. M.} and Barnett, {R. M.} and Z. Barnovska-Blenessy and A. Baroncelli and G. Barone and Barr, {A. J.} and {Barranco Navarro}, L. and F. Barreiro and {Barreiro Guimar{\~a}es da Costa}, J. and R. Bartoldus and Barton, {A. E.} and P. Bartos and A. Basalaev and A. Bassalat and Bates, {R. L.} and Batista, {S. J.} and S. Batlamous and Batley, {J. R.} and M. Battaglia and M. Bauce and F. Bauer and Bauer, {K. T.} and Bawa, {H. S.} and Beacham, {J. B.} and T. Beau and Beauchemin, {P. H.} and P. Bechtle and Beck, {H. C.} and Beck, {H. P.} and K. Becker and M. Becker and C. Becot and Beddall, {A. J.} and Beddall, {A. J.} and Bednyakov, {V. A.} and M. Bedognetti and Bee, {C. P.} and Beermann, {T. A.} and M. Begalli and M. Begel and A. Behera and Behr, {J. K.} and F. Beisiegel and Bell, {A. S.} and G. Bella and L. Bellagamba and A. Bellerive and M. Bellomo and P. Bellos and K. Belotskiy and Belyaev, {N. L.} and O. Benary and D. Benchekroun and M. Bender and N. Benekos and Y. Benhammou and {Benhar Noccioli}, E. and J. Benitez and Benjamin, {D. P.} and M. Benoit and Bensinger, {J. R.} and S. Bentvelsen and L. Beresford and M. Beretta and D. Berge and {Bergeaas Kuutmann}, E. and N. Berger and B. Bergmann and Bergsten, {L. J.} and J. Beringer and S. Berlendis and Bernard, {N. R.} and G. Bernardi and C. Bernius and Bernlochner, {F. U.} and T. Berry and P. Berta and C. Bertella and G. Bertoli and Bertram, {I. A.} and Besjes, {G. J.} and {Bessidskaia Bylund}, O. and M. Bessner and N. Besson and S. Shojaii",

note = "Copyright the Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2019",

month = apr,

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

language = "English",

volume = "2019",

pages = "1--46",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer, Springer Nature",

number = "4",

}

TY - JOUR

T1 - Study of the rare decays of Bs0 and B0 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 - Ali, B.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Alonso, A.

AU - Alonso, F.

AU - Alpigiani, C.

AU - Alshehri, A. A.

AU - Alstaty, M. I.

AU - Alvarez Gonzalez, B.

AU - Álvarez Piqueras, D.

AU - Alviggi, M. G.

AU - Amadio, B. T.

AU - Amaral Coutinho, Y.

AU - Ambler, A.

AU - Ambroz, L.

AU - Amelung, C.

AU - Amidei, D.

AU - Amor Dos Santos, S. P.

AU - Amoroso, S.

AU - Amrouche, C. S.

AU - An, F.

AU - Anastopoulos, C.

AU - Ancu, L. S.

AU - Andari, N.

AU - Andeen, T.

AU - Anders, C. F.

AU - Anders, J. K.

AU - Anderson, K. J.

AU - Andreazza, A.

AU - Andrei, V.

AU - Anelli, C. R.

AU - Angelidakis, S.

AU - Angelozzi, I.

AU - Angerami, A.

AU - Anisenkov, A. V.

AU - Annovi, A.

AU - Antel, C.

AU - Anthony, M. T.

AU - Antonelli, M.

AU - Antrim, D. J.A.

AU - Anulli, F.

AU - Aoki, M.

AU - Aparisi Pozo, J. A.

AU - Aperio Bella, L.

AU - Arabidze, G.

AU - Araque, J. P.

AU - Araujo Ferraz, V.

AU - Araujo Pereira, R.

AU - Arce, A. T.H.

AU - Ardell, R. E.

AU - Arduh, F. A.

AU - Arguin, J. F.

AU - Argyropoulos, S.

AU - Arling, J. H.

AU - Armbruster, A. J.

AU - Armitage, L. J.

AU - Armstrong, A.

AU - Arnaez, O.

AU - Arnold, H.

AU - Arratia, M.

AU - Arslan, O.

AU - Artamonov, A.

AU - Artoni, G.

AU - Artz, S.

AU - Asai, S.

AU - Asbah, N.

AU - Asimakopoulou, E. M.

AU - Asquith, L.

AU - Assamagan, K.

AU - Astalos, R.

AU - Atkin, R. J.

AU - Atkinson, M.

AU - Atlay, N. B.

AU - Augsten, K.

AU - Avolio, G.

AU - Avramidou, R.

AU - Ayoub, M. K.

AU - Azoulay, A. M.

AU - Azuelos, G.

AU - Baas, A. E.

AU - Baca, M. J.

AU - Bachacou, H.

AU - Bachas, K.

AU - Backes, M.

AU - Bagnaia, P.

AU - Bahmani, M.

AU - Bahrasemani, H.

AU - Bailey, A. J.

AU - Bailey, V. R.

AU - Baines, J. T.

AU - Bajic, M.

AU - Bakalis, C.

AU - Baker, O. K.

AU - Bakker, P. J.

AU - Bakshi Gupta, D.

AU - Balaji, S.

AU - Baldin, E. M.

AU - Balek, P.

AU - Balli, F.

AU - Balunas, W. K.

AU - Balz, J.

AU - Banas, E.

AU - Bandyopadhyay, A.

AU - Banerjee, S.

AU - Bannoura, A. A.E.

AU - Barak, L.

AU - Barbe, W. M.

AU - Barberio, E. L.

AU - Barberis, D.

AU - Barbero, M.

AU - Barillari, T.

AU - Barisits, M. S.

AU - Barkeloo, J.

AU - Barklow, T.

AU - Barnea, R.

AU - Barnes, S. L.

AU - Barnett, B. M.

AU - Barnett, R. M.

AU - Barnovska-Blenessy, Z.

AU - Baroncelli, A.

AU - Barone, G.

AU - Barr, A. J.

AU - Barranco Navarro, L.

AU - Barreiro, F.

AU - Barreiro Guimarães da Costa, J.

AU - Bartoldus, R.

AU - Barton, A. E.

AU - Bartos, P.

AU - Basalaev, A.

AU - Bassalat, A.

AU - Bates, R. L.

AU - Batista, S. J.

AU - Batlamous, S.

AU - Batley, J. R.

AU - Battaglia, M.

AU - Bauce, M.

AU - Bauer, F.

AU - Bauer, K. T.

AU - Bawa, H. S.

AU - Beacham, J. B.

AU - Beau, T.

AU - Beauchemin, P. H.

AU - Bechtle, P.

AU - Beck, H. C.

AU - Beck, H. P.

AU - Becker, K.

AU - Becker, M.

AU - Becot, C.

AU - Beddall, A. J.

AU - Bednyakov, V. A.

AU - Bedognetti, M.

AU - Bee, C. P.

AU - Beermann, T. A.

AU - Begalli, M.

AU - Begel, M.

AU - Behera, A.

AU - Behr, J. K.

AU - Beisiegel, F.

AU - Bell, A. S.

AU - Bella, G.

AU - Bellagamba, L.

AU - Bellerive, A.

AU - Bellomo, M.

AU - Bellos, P.

AU - Belotskiy, K.

AU - Belyaev, N. L.

AU - Benary, O.

AU - Benchekroun, D.

AU - Bender, M.

AU - Benekos, N.

AU - Benhammou, Y.

AU - Benhar Noccioli, E.

AU - Benitez, J.

AU - Benjamin, D. P.

AU - Benoit, M.

AU - Bensinger, J. R.

AU - Bentvelsen, S.

AU - Beresford, L.

AU - Beretta, M.

AU - Berge, D.

AU - Bergeaas Kuutmann, E.

AU - Berger, N.

AU - Bergmann, B.

AU - Bergsten, L. J.

AU - Beringer, J.

AU - Berlendis, S.

AU - Bernard, N. R.

AU - Bernardi, G.

AU - Bernius, C.

AU - Bernlochner, F. U.

AU - Berry, T.

AU - Berta, P.

AU - Bertella, C.

AU - Bertoli, G.

AU - Bertram, I. A.

AU - Besjes, G. J.

AU - Bessidskaia Bylund, O.

AU - Bessner, M.

AU - Besson, N.

AU - Shojaii, S.

N1 - Copyright the Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2019/4

Y1 - 2019/4

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 (B0 → 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 (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(Bs0 → μ+μ−) plane.

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 (B0 → 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 (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(Bs0 → μ+μ−) plane.

KW - Hadron-Hadron scattering (experiments)

UR - http://www.scopus.com/inward/record.url?scp=85064541986&partnerID=8YFLogxK

U2 - 10.1007/JHEP04(2019)098

DO - 10.1007/JHEP04(2019)098

M3 - Article

AN - SCOPUS:85064541986

SN - 1029-8479

VL - 2019

SP - 1

EP - 46

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 98

ER -

Study of the rare decays of Bs0 and B0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector