Measurement of the B0 s → μμ effective lifetime with the ATLAS detector

ATLAS Publications, J.F. Allen, T.M. Carter, D. Duda, J.M. Gargan, R.Y. Gonzalez Andana, V.A. Parrish, E.A. Pender, T. Qiu, E.P. Takeva, N. Themistokleous, E.M. Villhauer, Z. Xu, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper reports the first ATLAS measurement of the B0 s → 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 B0
s effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B0s → μμ life-
time is 0.99+0.42−0.07 (stat.) ± 0.17 (syst.) ps and it is found to be consistent with the Standard Model.
Original languageEnglish
Article number199
Pages (from-to)1-31
Number of pages31
Journal Journal of High Energy Physics
Issue number9
Publication statusPublished - 28 Sept 2023

Keywords / Materials (for Non-textual outputs)

  • B Physics
  • Hadron-Hadron Scattering


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