Measurement of properties of $$ {\mathrm{B}}_{\mathrm{s}}^0 $$→ μ+μ− decays and search for B0→ μ+μ− with the CMS experiment

Results are reported for the B^0_\mathrm{s}\to\mu^+\mu^-branching fraction and effective lifetime and from a search for the decay B^0\to\mu^+\mu^- The analysis uses a data sample of proton-proton collisions accumulated by the CMS experiment in 2011, 2012, and 2016, with center-of-mass energies (integrated luminosities) of 7 TeV (5 fb^{-1}, 8 TeV (20 fb^{-1}, and 13 TeV (36 fb^{-1}. The branching fractions are determined by...