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Scientific article
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English

Measurement of the $ {B}_s^0 $→ μμ effective lifetime with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 09, no. 9
Publication date2023
First online date2023-09-28
Abstract

This paper reports the first ATLAS measurement of the $ {B}_s^0 $→ μμ effective lifetime. The measurement is based on the data collected in 2015–2016, amounting to 26.3 fb$^{−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 $ {B}_s^0 $ effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the $ {B}_s^0 $→ 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.

eng
Keywords
  • B Physics
  • Hadron-Hadron Scattering
  • P p: scattering
  • P p: colliding beams
  • B/s0: leptonic decay
  • Muon: pair production
  • B/s0: lifetime
  • Decay: time
  • ATLAS
  • CERN LHC Coll
  • Error: statistical
  • Data analysis method
  • Numerical calculations: Monte Carlo
  • Experimental results
  • B/s0 --> muon+ muon-
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Measurement of the $ {B}_s^0 $→ μμ effective lifetime with the ATLAS detector. In: The journal of high energy physics, 2023, vol. 09, n° 9. doi: 10.1007/jhep09(2023)199
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ISSN of the journal1029-8479
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