A search is performed for a heavy particle decaying into different-flavour,dilepton final states, using 139 $\mathrm{fb}^{-1}$ of proton-proton collisiondata at $\sqrt{s}=13$ TeV collected in 2015-2018 by the ATLAS detector at theLarge Hadron Collider. Final states with electrons, muons and hadronicallydecaying tau leptons are considered ($e\mu$, $e\tau$ or $\mu\tau$). Nosignificant excess over the Standard Model predictions is observed. Upperlimits on the production cross-section are set as a function of the mass of aZ' boson, a supersymmetric $\tau$-sneutrino, and a quantum black-hole. Theobserved 95% CL lower mass limits obtained on a typical benchmark model Z'boson are 5.0 TeV (e$\mu$), 4.0 TeV (e$\tau$), and 3.9 TeV ($\mu\tau$),respectively.

Search for lepton-flavour violation in high-mass dilepton final states using 139 $\mathrm{fb}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Capua, M;Mastroberardino, A;Meoni, E;Schioppa, M;Tassi, E;
2023-01-01

Abstract

A search is performed for a heavy particle decaying into different-flavour,dilepton final states, using 139 $\mathrm{fb}^{-1}$ of proton-proton collisiondata at $\sqrt{s}=13$ TeV collected in 2015-2018 by the ATLAS detector at theLarge Hadron Collider. Final states with electrons, muons and hadronicallydecaying tau leptons are considered ($e\mu$, $e\tau$ or $\mu\tau$). Nosignificant excess over the Standard Model predictions is observed. Upperlimits on the production cross-section are set as a function of the mass of aZ' boson, a supersymmetric $\tau$-sneutrino, and a quantum black-hole. Theobserved 95% CL lower mass limits obtained on a typical benchmark model Z'boson are 5.0 TeV (e$\mu$), 4.0 TeV (e$\tau$), and 3.9 TeV ($\mu\tau$),respectively.
2023
High Energy Physics - Experiment
High Energy Physics - Experiment
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/361265
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