The effective lifetime of the B0s meson in the decay B0s → J/ψK0S 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 B0s 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.
Measurement of the B0s -> J/psi K0S effective lifetime from proton-proton collisions at sqrt(s) = 13 TeV / Babbar, J.; Belforte, S.; Candelise, V.; Casarsa, M.; Cossutti, F.; DE LEO, K.; DELLA RICCA, G.; ET AL (the CMS, Collaboration). - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 2024:10(2024), pp. 247.1-247.40. [10.1007/JHEP10(2024)247]
Measurement of the B0s -> J/psi K0S effective lifetime from proton-proton collisions at sqrt(s) = 13 TeV
BABBAR, J.;CANDELISE, V.;DELLA RICCA, G.;
2024-01-01
Abstract
The effective lifetime of the B0s meson in the decay B0s → J/ψK0S 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 B0s 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.| File | Dimensione | Formato | |
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