Measurement of the B<sub>s</sub><SUP>0</SUP> → J/ψK<sub>S</sub><SUP>0</SUP> effective lifetime from proton-proton collisions at √<i>s</i>=13 TeV
JOURNAL OF HIGH ENERGY PHYSICS, vol.2024, no.10, 2024 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 2024 Issue: 10
- Publication Date: 2024
- Doi Number: 10.1007/jhep10(2024)247
- Journal Name: JOURNAL OF HIGH ENERGY PHYSICS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
- Keywords: B Physics, Hadron-Hadron Scattering, Lifetime
- Istanbul University Affiliated: Yes
Abstract
The effective lifetime of the B-s(0) meson in the decay B-s(0) -> J/psi K-S(0) is measured using data collected during 2016-2018 with the CMS detector in root 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 B-s(0) 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.