Measurement of the Bs0→ μμ effective lifetime with the ATLAS detector

The ATLAS collaboration [email protected]

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1 Citation (Scopus)


This paper reports the first ATLAS measurement of the Bs0→ μμ effective lifetime. The measurement is based on the data collected in 2015–2016, amounting to 26.3 fb−1 of 13 TeV LHC proton-proton collisions. The proper decay-time distribution of 58 ± 13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the Bs0 effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the Bs0→ μμ lifetime is 0.99−0.07+0.42 (stat.) ± 0.17 (syst.) ps and it is found to be consistent with the Standard Model.

Original languageEnglish
Article number199
JournalJournal of High Energy Physics
Issue number9
Publication statusPublished - Sept 2023


  • B Physics
  • Hadron-Hadron Scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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