CMS-PAS-BPH-17-004

CMS-PAS-BPH-17-004
Search for $\tau \to 3\mu$ decays using $\tau$ leptons produced in D and B meson decays
CMS Collaboration
March 2019

Abstract: A search for charged lepton flavor violating decays $\tau\to3\mu$ has been performed using proton-proton collisions with a center-of-mass energy of 13 TeV. The analysis uses the data set collected by the CMS detector in 2016, corresponding to an integrated luminosity of 33 fb $^{-1}$ , and exploits $\tau$ leptons produced in D and B meson decays. No signal is observed, and an upper limit of $8.8 \times 10^{-8}$ is set at the 90% confidence level on the branching fraction of the $\tau$ lepton to three muons.
Links: CDS record (PDF) ; inSPIRE record ; HepData record ; CADI line (restricted) ; These preliminary results are superseded in this paper, JHEP 01 (2021) 163. The superseded preliminary plots can be found here.

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