Hi all,

Our paper on BsMuMu just appeared on the arXiv: https://arxiv.org/abs/1703.05747.

These are our results:

1. BF(B0s→μ+μ−)=(3.0±0.6+0.3−0.2)×10−9 , where the first uncertainty is statistical and the second systematic. This is a 7.8 sigma observation and the first single experiment one as a result.

2. The first measurement of the B0s→μ+μ− effective lifetime, τ(B0s→μ+μ−)=2.04±0.44±0.05 ps.

3. No evidence for B0→μ+μ−, so a stringent limit is put at BF(B0→μ+μ−)<3.4×10−10.

All results are consistent with the Standard Model.

Thanks to Jennifer, Siim, Flavio and Antonio, who helped from the Nikhef side to obtain this result!

Cheers,

Mick

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