CMS-PAS-BPH-22-001 | ||
Measurement of the $ \mathrm{B}^0_\mathrm{s} $ effective lifetime in the decay $ \mathrm{B}^0_\mathrm{s}\to\mathrm{J}/\psi\,\mathrm{K}^0_\mathrm{S} $ from pp collisions at $ \sqrt{s} = $ 13 TeV | ||
CMS Collaboration | ||
28 March 2024 | ||
Abstract: The effective lifetime of the $ \mathrm{B}^0_\mathrm{s} $ meson in the decay $ \mathrm{B}^0_\mathrm{s}\to\mathrm{J}/\psi \, \mathrm{K}^0_\mathrm{S} $ is measured using data collected during 2016-2018 with the CMS detector in $ \sqrt{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 $ \mathrm{B}^0_\mathrm{s}\to\mathrm{J}/\psi\, \mathrm{K}^0_\mathrm{S} $ meson invariant mass and proper decay time distributions. The resulting value is 1.59 $ \pm $ 0.07 (stat) $ \pm $ 0.03 (syst) ps, where the first uncertainty represents the statistical uncertainty and the latter corresponds to the systematic uncertainty. | ||
Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
Compact Muon Solenoid LHC, CERN |