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

ATLAS Collaboration,

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

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ATLAS Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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ATLAS Collaboration (2020). Searches for lepton-flavour-violating decays of the Higgs boson in $\sqrt{s}=13$ TeV pp collisions with the ATLAS detector. Physics Letters B, 800, 135069. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2019-149.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1B5B-5

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.