This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H -> e tau and H -> 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 root 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(-0.10)(+0.13)%) and 0.28%(0.37(-0.10)(+0.14)%) for H -> e tau and H -> mu tau, respectively. (C) 2019 The Author(s). Published by Elsevier B.V.

Searches for lepton-flavour-violating decays of the Higgs boson in root s=13 TeV pp collisions with the ATLAS detector / Aad, G., Abbott, B., Abbott, D.c., Abud, A.a., Abeling, K., Abhayasinghe, D.k., Abidi, S.h., Abouzeid, O.s., Abraham, N.l., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.s., Achkar, B., Adachi, S., Adam, L., Bourdarios, C.a., Adamczyk, L., Adamek, L., Adelman, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 800:(2020). [10.1016/j.physletb.2019.135069]

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

Gonella L;
2020-01-01

Abstract

This Letter presents direct searches for lepton flavour violation in Higgs boson decays, H -> e tau and H -> 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 root 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(-0.10)(+0.13)%) and 0.28%(0.37(-0.10)(+0.14)%) for H -> e tau and H -> mu tau, respectively. (C) 2019 The Author(s). Published by Elsevier B.V.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/3100935
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