Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications; T.M. Carter; R.Y. Gonzalez Andana; A. Hasib; M.P. Heath; S. Palazzo; V.A. Parrish; E.A. Pender; E.P. Takeva; N. Themistokleous; E.M. Villhauer; E. Zaid

doi:10.1007/JHEP07(2023)118

Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications
, T.M. Carter
, R.Y. Gonzalez Andana
, A. Hasib
, M.P. Heath
, S. Palazzo
, V.A. Parrish
, E.A. Pender
, E.P. Takeva
, N. Themistokleous
, E.M. Villhauer
, E. Zaid

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A search for vector-like leptons in multilepton (two, three, or four-or-more
electrons plus muons) final states with zero or more hadronic τ -lepton decays is presented. The search is performed using a dataset corresponding to an integrated luminosity of 139 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. To maximize the separation of signal and background, a machine-learning classifier is used. No excess of events is observed beyond the Standard Model expectation. Using a doublet vector-like lepton model, vector-like leptons coupling to third-generation Standard Model leptons are excluded in the mass range from 130 GeV to 900 GeV at the 95% confidence level, while the highest excluded mass is expected to be 970 GeV.

Original language	English
Article number	118
Pages (from-to)	1-48
Number of pages	48
Journal	Journal of High Energy Physics
Volume	2023
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2023)118
Publication status	Published - 13 Jul 2023

Keywords / Materials (for Non-textual outputs)

Beyond Standard Model
Hadron-Hadron Scattering
Tau Physics

Access to Document

10.1007/JHEP07(2023)118Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2303.05441

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

Cite this

ATLAS Publications, Carter, T. M., Gonzalez Andana, R. Y., Hasib, A., Heath, M. P., Palazzo, S., Parrish, V. A., Pender, E. A., Takeva, E. P., Themistokleous, N., Villhauer, E. M., & Zaid, E. (2023). Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2023(7), 1-48. Article 118. https://doi.org/10.1007/JHEP07(2023)118

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title = "Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector",

abstract = "A search for vector-like leptons in multilepton (two, three, or four-or-more electrons plus muons) final states with zero or more hadronic τ -lepton decays is presented. The search is performed using a dataset corresponding to an integrated luminosity of 139 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. To maximize the separation of signal and background, a machine-learning classifier is used. No excess of events is observed beyond the Standard Model expectation. Using a doublet vector-like lepton model, vector-like leptons coupling to third-generation Standard Model leptons are excluded in the mass range from 130 GeV to 900 GeV at the 95\% confidence level, while the highest excluded mass is expected to be 970 GeV.",

keywords = "Beyond Standard Model, Hadron-Hadron Scattering, Tau Physics",

author = "\{ATLAS Publications\} and Clark, \{Philip James\} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, \{Victoria Jane\} and Liza Mijovic and Benjamin Wynne and Sara Alderweireldt and T.M. Carter and \{Gonzalez Andana\}, R.Y. and A. Hasib and M.P. Heath and S. Palazzo and V.A. Parrish and E.A. Pender and E.P. Takeva and N. Themistokleous and E.M. Villhauer and E. Zaid",

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doi = "10.1007/JHEP07(2023)118",

language = "English",

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ATLAS Publications, Carter, TM, Gonzalez Andana, RY, Hasib, A, Heath, MP, Palazzo, S, Parrish, VA, Pender, EA, Takeva, EP, Themistokleous, N, Villhauer, EM & Zaid, E 2023, 'Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector', Journal of High Energy Physics, vol. 2023, no. 7, 118, pp. 1-48. https://doi.org/10.1007/JHEP07(2023)118

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AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Alderweireldt, Sara

AU - Carter, T.M.

AU - Gonzalez Andana, R.Y.

AU - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Parrish, V.A.

AU - Pender, E.A.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Zaid, E.

PY - 2023/7/13

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AB - A search for vector-like leptons in multilepton (two, three, or four-or-more electrons plus muons) final states with zero or more hadronic τ -lepton decays is presented. The search is performed using a dataset corresponding to an integrated luminosity of 139 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. To maximize the separation of signal and background, a machine-learning classifier is used. No excess of events is observed beyond the Standard Model expectation. Using a doublet vector-like lepton model, vector-like leptons coupling to third-generation Standard Model leptons are excluded in the mass range from 130 GeV to 900 GeV at the 95% confidence level, while the highest excluded mass is expected to be 970 GeV.

KW - Beyond Standard Model

KW - Hadron-Hadron Scattering

KW - Tau Physics

U2 - 10.1007/JHEP07(2023)118

DO - 10.1007/JHEP07(2023)118

M3 - Article

SN - 1029-8479

VL - 2023

SP - 1

EP - 48

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 118

ER -

Search for third-generation vector-like leptons in pp collisions at √s = 13 TeV with the ATLAS detector

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this