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



Aad, G, Abbott, B, Abeling, K, Abicht, NJ, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC
et al (show 2913 more authors) (2023) Search for lepton-flavour violation in high-mass dilepton final states using 139 fb−1 of pp collisions at $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2023 (10). 82-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A search is performed for a heavy particle decaying into different-flavour, dilepton final states, using 139 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup> of proton-proton collision data at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV collected in 2015–2018 by the ATLAS detector at the Large Hadron Collider. Final states with electrons, muons and hadronically decaying tau leptons are considered (<jats:italic>eμ</jats:italic>, <jats:italic>eτ</jats:italic> or <jats:italic>μτ</jats:italic>). No significant excess over the Standard Model predictions is observed. Upper limits on the production cross-section are set as a function of the mass of a <jats:italic>Z</jats:italic>′ boson, a supersymmetric <jats:italic>τ</jats:italic>-sneutrino, and a quantum black-hole. The observed 95% CL lower mass limits obtained on a typical benchmark model <jats:italic>Z</jats:italic>′ boson are 5.0 TeV (e<jats:italic>μ</jats:italic>), 4.0 TeV (e<jats:italic>τ</jats:italic>), and 3.9 TeV (<jats:italic>μτ</jats:italic>), respectively.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 14 Nov 2023 10:49
Last Modified: 16 Mar 2024 02:50
DOI: 10.1007/jhep10(2023)082
Open Access URL: https://link.springer.com/article/10.1007/JHEP10(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3176792