Measurement of the Bs0→J/ψη lifetime

The LHCb Collaboration

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Using a data set corresponding to an integrated luminosity of 3 fb−1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV, the effective lifetime in the Bs 0→J/ψη decay mode, τeff, is measured to beτeff=1.479±0.034 (stat)±0.011 (syst) ps. Assuming CP conservation, τeff corresponds to the lifetime of the light Bs 0 mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.
Original languageEnglish
Pages (from-to)484-492
Number of pages9
JournalPhysics Letters B
Publication statusPublished - 2016
Externally publishedYes

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