Speaker
Description
A flavor-tagged time-dependent angular analysis of the decay Bs→ϕϕ is
performed using pp collision data collected by the LHCb experiment at the
center-of-mass energy of 13TeV, corresponding to an integrated luminosity of
6 fb−1. The CP-violating phase and direct CP-violation parameter are measured to
be ϕs=−0.042±0.075±0.009 rad and |λ| = 1.004 ± 0.030 ± 0.009, respectively, assuming the same values for all polarization states of the ϕϕ system. This is the most precise study of time-dependent CP violation in a penguin-dominated B meson decay. The results are consistent with CP symmetry and with the Standard Model predictions.
In this presentation, I will explicitly introduce the analysis procedures impletemented in this measurement, and discuss the results correspondence with the SM predictions.
