Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ = 13 TeV
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13130_2021_Article_14682.pdf
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Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Ambrogi, F.
Bergauer, T.
Dragicevic, M.
Erö, J.
Escalante Del Valle, A.
Frühwirth, R.
Jeitler, M.
Date Issued
January 26, 2021
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2021 Jan 26;2021(1):163
Version
Final published version
Abstract
Abstract
Results are reported from a search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at
s
$$ \sqrt{\mathrm{s}} $$
= 13 TeV. The data sample corresponds to an integrated luminosity of 33.2 fb−1 recorded by the CMS experiment at the LHC in 2016. The search exploits τ leptons produced in both W boson and heavy-flavor hadron decays. No significant excess above the expected background is observed. An upper limit on the branching fraction ℬ(τ → 3μ) of 8.0 × 10−8 at 90% confidence level is obtained, with an expected upper limit of 6.9 × 10−8.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP01(2021)163
