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Measurement of the B s 0 → J / ψ η lifetime
- Collaboration, The LHCb;
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Published Web Location
http://doi.org/10.1016/j.physletb.2016.10.006No data is associated with this publication.
Abstract
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 Bs0→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 Bs0 mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.