@Article{ATLASCollaborationAad_etal2023,
author="ATLAS Collaboration (Aad, G. et al
and Amos, K. R.
and Aparisi Pozo, J. A.
and Bailey, A. J.
and Bouchhar, N.
and Cabrera Urban, S.
and Cantero, J.
and Cardillo, F.
and Castillo Gimenez, V.
and Chitishvili, M.
and Costa, M. J.
and Didenko
and Escobar, C.
and Fiorini, L.
and Fullana Torregrosa, E.
and Fuster, J.
and Garcia, C.
and Garcia Navarro, J. E.
and Gomez Delegido, A. J.
and Gonzalez de la Hoz, S.
and Gonzalvo Rodriguez, G. R.
and Guerrero Rojas, J. G. R.
and Higon-Rodriguez, E.
and Lacasta, C.
and Lozano Bahilo, J. J.
and Marti-Garcia, S.
and Martinez Agullo, P.
and Miralles Lopez, M.
and Mitsou, V. A.
and Monsonis Romero, L.
and Moreno Llacer, M.
and Munoz Perez, D.
and Navarro-Gonzalez, J.
and Poveda, J.
and Prades Iba{\~{n}}ez, A.
and Rubio Jimenez, A.
and Ruiz-Martinez, A.
and Sabatini, P.
and Salt, J.
and Sanchez Sebastian, V.
and Sayago Galvan, I.
and Senthilkumar, V.
and Soldevila, U.
and Sanchez, J.
and Torro Pastor, E.
and Valero, A.
and Valls Ferrer, J. A.
and Varriale, L.
and Villaplana Perez, M.
and Vos, M.",
title="Searches for lepton-flavour-violating decays of the Higgs boson into e$\tau$ and $\mu$$\tau$ in {\textsurd}s=13 TeV pp collisions with the ATLAS detector",
journal="Journal of High Energy Physics",
year="2023",
publisher="Springer",
volume="07",
number="7",
pages="166--74pp",
optkeywords="Hadron-Hadron Scattering",
abstract="This paper presents direct searches for lepton flavour violation in Higgs boson decays, H -> e tau and H -> $\mu$tau, performed using data collected 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 138 fb(-1). Leptonic (tau -> l nu(l)nu(tau)) and hadronic (tau -> hadrons nu(tau)) decays of the tau-lepton are considered. Two background estimation techniques are employed: the MC-template method, based on data-corrected simulation samples, and the Symmetry method, based on exploiting the symmetry between electrons and muons in the Standard Model backgrounds. No significant excess of events is observed and the results are interpreted as upper limits on lepton-flavour-violating branching ratios of the Higgs boson. The observed (expected) upper limits set on the branching ratios at 95{\%} confidence level, B(H -> e tau) < 0.20{\%} (0.12{\%}) and B(H -> $\mu$tau ) < 0.18{\%} (0.09{\%}), are obtained with the MC-template method from a simultaneous measurement of potential H -> e tau and H -> $\mu$tau signals. The best-fit branching ratio difference, B(H -> $\mu$tau) -> B(H -> e tau), measured with the Symmetry method in the channel where the tau-lepton decays to leptons, is (0.25 0.10){\%}, compatible with a value of zero within 2.5 sigma.",
optnote="WOS:001061947900001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5678), last updated on Tue, 10 Oct 2023 06:43:20 +0000",
issn="1029-8479",
doi="10.1007/JHEP07(2023)166",
opturl="https://arxiv.org/abs/2302.05225",
opturl="https://doi.org/10.1007/JHEP07(2023)166",
language="English"
}