# Measurement of the B0s→J/ψη lifetime

Abstract : Using a data set corresponding to an integrated luminosity of 3fb−1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV, the effective lifetime in the B0s→J/ψη decay mode, τeff, is measured to be τeff=1.479±0.034 (stat)±0.011 (syst) ps. Assuming CP conservation, τeff corresponds to the lifetime of the light B0s mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01347965
Contributor : Claudine Bombar <>
Submitted on : Friday, July 22, 2016 - 9:32:56 AM
Last modification on : Tuesday, April 20, 2021 - 12:00:16 PM

### Citation

R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Measurement of the B0s→J/ψη lifetime. Physics Letters B, Elsevier, 2016, 762, pp.484-492. ⟨10.1016/j.physletb.2016.10.006⟩. ⟨in2p3-01347965⟩

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