Measurement of the Bs0→J/ψKS0 effective lifetime from proton-proton collisions at s = 13 TeV

The CMS collaboration

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Abstract

The effective lifetime of the Bs0 meson in the decay Bs0→J/ψKS0 is measured using data collected during 2016–2018 with the CMS detector in s = 13 TeV proton-proton collisions at the LHC, corresponding to an integrated luminosity of 140 fb−1. The effective lifetime is determined by performing a two-dimensional unbinned maximum likelihood fit to the Bs0 meson invariant mass and proper decay time distributions. The resulting value of 1.59 ± 0.07(stat) ± 0.03(syst) ps is the most precise measurement to date and is in good agreement with the expected value.

Original languageEnglish
Article number247
JournalJournal of High Energy Physics
Volume2024
Issue number10
DOIs
Publication statusPublished - Oct 2024
Externally publishedYes

Keywords

  • B Physics
  • Hadron-Hadron Scattering
  • Lifetime

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