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First study of the CP-violating phase and decay-width difference in Bs0→ψ(2S)ϕ decays
- Collaboration, The LHCb;
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Published Web Location
http://doi.org/10.1016/j.physletb.2016.09.028No data is associated with this publication.
Abstract
A time-dependent angular analysis of Bs0→ψ(2S)ϕ decays is performed using data recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0fb−1 collected during Run 1 of the LHC. The CP-violating phase and decay-width difference of the Bs0 system are measured to be ϕs=0.23−0.28+0.29±0.02rad and ΔΓs=0.066−0.044+0.041±0.007ps−1, respectively, where the first uncertainty is statistical and the second systematic. This is the first time that ϕs and ΔΓs have been measured in a decay containing the ψ(2S) resonance.