# Searches for lepton-flavour-violating decays of the Higgs boson in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector

Collaboration, ATLAS
(2020) Searches for lepton-flavour-violating decays of the Higgs boson in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector. Phys. Lett. B, 800. 135069 - 135069.

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## Abstract

This Letter presents direct searches for lepton flavour violation in Higgs boson decays, $H\rightarrow e\tau$ and $H\rightarrow\mu\tau$, performed with the ATLAS detector at the LHC. The searches are based on a data sample of proton-proton collisions at a centre-of-mass energy $\sqrt{s} = 13$ TeV, corresponding to an integrated luminosity of 36.1 fb$^{-1}$. No significant excess is observed above the expected background from Standard Model processes. The observed (median expected) 95% confidence-level upper limits are 0.47% (0.34$^{+0.13}_{-0.10}$%) and 0.28% (0.37$^{+0.14}_{-0.10}$%) for $H\rightarrow e\tau$ and $H\rightarrow\mu\tau$, respectively.

Item Type: Article 38 pages in total, author list starting page 22, 5 figures, 6 tables, submitted to PLB. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-08 hep-ex, hep-ex Symplectic Admin 02 Dec 2019 09:21 17 May 2021 11:22 10.1016/j.physletb.2019.135069 https://www.sciencedirect.com/science/article/pii/... https://livrepository.liverpool.ac.uk/id/eprint/3064392