Hayrapetyan, A.Tumasyan, A.Adam, W.Andrejkovic, J.W.Bergauer, T.Chatterjee, S.Sağır, Sinan2025-01-122025-01-1220241029-8479https://hdl.handle.net/11492/8999https://doi.org/10.1007/JHEP10(2024)247The effective lifetime of the Bs0 meson in the decay Bs0?J/?KS0 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. © The Author(s) 2024.enB PhysicsHadron-Hadron ScatteringLifetimeArticle202410info:eu-repo/semantics/closedAccess2-s2.0-85209221144WOS:00140659940000110.1007/JHEP10(2024)247Q1Q1