Measurement of τL using the Bs0→J/ψη decay mode

LHCb Collaboration

Research output: Indexed journal article Articlepeer-review


Using a proton–proton collision data sample collected by the LHCb detector and corresponding to an integrated luminosity of 5.7fb-1 , the lifetime of the light Bs0 mass eigenstate, τL , is measured using the Bs0→J/ψη decay mode to be τL=1.445±0.016(stat)±0.008(syst)ps. A combination of this result with a previous LHCb analysis using an independent dataset corresponding to 3 fb - 1 of integrated luminosity gives τL=1.452±0.014±0.007±0.002ps, where the first uncertainty is statistical, the second due to the uncorrelated part of the systematic uncertainty and the third due to the correlated part of the systematic uncertainty.

Original languageEnglish
Article number629
JournalEuropean Physical Journal C
Issue number7
Publication statusPublished - Jul 2023


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