, Axe 2 started 2 month ago, two strategy explored in parallel : ? Apply the exact same selection than for Run 1. ? Re-optimize the selection, the used regions

, What is done : ? Normalization channel

, ? A possible re-selection has been designed (performance estimation ongoing). B 0 (s) ? ? + ? ? : Conclusion

, ? If not for LHC, B 0 (s)

, ? ? + ? ? will be a golden mode for the future collider (like FCC)

, Comparison with sister processes with e or µ ? test of LFU

, ? Definitively worthwhile to work on it and to prepare the future of this channel ! !