Searches for lepton-flavour-violating decays of the Higgs boson in √s=13 TeV pp collisions with the ATLAS detector

ATLAS Collaboration; Paul Newman

doi:10.1016/j.physletb.2019.135069

Searches for lepton-flavour-violating decays of the Higgs boson in √s=13 TeV pp collisions with the ATLAS detector

ATLAS Collaboration, Paul Newman

Physics and Astronomy

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Abstract

This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H→eτ and H→μτ, 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 √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 on the lepton-flavour-violating branching ratios are 0.47% (0.34^+0.13_−0.10%) and 0.28% (0.37^+0.14_−0.10%) for H→eτ and H→μτ, respectively.

Original language	English
Article number	135069
Number of pages	23
Journal	Physics Letters B
Volume	800
Early online date	4 Nov 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.135069
Publication status	Published - 10 Jan 2020

Bibliographical note

All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-08

Keywords

hep-ex

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ATLAS_et_al_Searches_for_lepton-flavour-violating_decays_Physics_Letters_B_2019Final published version, 1.78 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Searches for lepton-flavour-violating decays of the Higgs boson in √s=13 TeV pp collisions with the ATLAS detector",

abstract = "This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H→eτ and H→μτ, 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 √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 on the lepton-flavour-violating branching ratios are 0.47% (0.34+0.13−0.10%) and 0.28% (0.37+0.14−0.10%) for H→eτ and H→μτ, respectively.",

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AU - ATLAS Collaboration

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AB - This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H→eτ and H→μτ, 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 √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 on the lepton-flavour-violating branching ratios are 0.47% (0.34+0.13−0.10%) and 0.28% (0.37+0.14−0.10%) for H→eτ and H→μτ, respectively.

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ER -

Searches for lepton-flavour-violating decays of the Higgs boson in √s=13 TeV pp collisions with the ATLAS detector

Abstract

Bibliographical note

Keywords

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