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@ARTICLE{Sirunyan:426641,
      author       = {Sirunyan, Albert M and others},
      collaboration = {{CMS Collaboration}},
      title        = {{M}easurement of properties of
                      {B}$^0_\mathrm{s}\to\mu^+\mu^-$ decays and search for
                      {B}$^0\to\mu^+\mu^-$ with the {CMS} experiment},
      reportid     = {PUBDB-2019-03821, arXiv:1910.12127. CMS-BPH-16-004.
                      CERN-EP-2019-215},
      year         = {2019},
      note         = {},
      abstract     = {Results are reported for the B0s→μ+μ−s0→μ+μ−
                      branching fraction and effective lifetime and from a search
                      for the decay B0→μ+μ−0→μ+μ−. 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−1−1),
                      8 TeV (20 fb−1−1), and 13 TeV (36 fb−1−1). The
                      branching fractions are determined by measuring event yields
                      relative to B+→+→J/ψψK++ decays (with
                      J/ψ→μ+μ−ψ→μ+μ−), which results in the
                      reduction of many of the systematic uncertainties. The decay
                      B0s→μ+μ−s0→μ+μ− is observed with a significance
                      of 5.6 standard deviations. The branching fraction is
                      measured to be BB(B0s→μ+μ−s0→μ+μ−) =
                      [2.9+0.7−0.6−0.6+0.7
                      (exp)±±0.2(frag)]×10−9×10−9, where the first
                      uncertainty combines the experimental statistical and
                      systematic contributions, and the second is due to the
                      uncertainty in the ratio of the B0ss0 and the B++
                      fragmentation functions. No significant excess is observed
                      for the decay B0→μ+μ−0→μ+μ−, and an upper limit
                      of BB(B0→μ+μ−0→μ+μ−) < 3.6××10−10−10 is
                      obtained at $95\%$ confidence level. The
                      B0s→μ+μ−s0→μ+μ− effective lifetime is measured
                      to be τμ+μ−τμ+μ−= 1.70+0.61−0.44−0.44+0.61 ps.
                      These results are consistent with standard model
                      predictions.},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)25 / PUB:(DE-HGF)29},
      eprint       = {1910.12127},
      howpublished = {arXiv:1910.12127},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1910.12127;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/426641},
}