Measurement of the B⁰ₛ → J/ψK⁰ₛ effective lifetime from proton-proton collisions at √s = 13 TeV
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2024-10
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Journal Article
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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.
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published
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2024 (10)
Pages / Article No.
247
Publisher
Springer
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Subject
B Physics; Hadron-Hadron Scattering; Lifetime
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09720 - de Cosa, Annapaola / de Cosa, Annapaola
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
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Funding
758316 - Majorana neutrino discovery strategy with CMS (EC)