CMS-PAS-HIG-20-009

CMS-PAS-HIG-20-009
Search for lepton-flavor violating decays of the Higgs boson to $\mu\tau$ and e $\tau$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV
CMS Collaboration
March 2021

Abstract: A search is presented for lepton-flavor violating decays of the Higgs boson to $\mu\tau$ and e $\tau$ . The analysis is based on data corresponding to an integrated luminosity of 137 fb $^{-1}$ , collected at the CMS detector of the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. No significant excess has been found, and the results are interpreted in terms of upper limits on lepton-flavor violating branching fractions of the Higgs boson. The observed and expected upper limits on the branching fractions are, respectively, $\mathcal{B}(\mathrm{H}\to\mu\tau) <$ 0.15% and $<$ 0.15% and $\mathcal{B}(\mathrm{H}\to e\tau) <$ 0.22% and $<$ 0.16% set at 95% confidence level.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PRD. The superseded preliminary plots can be found here.

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