Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector

ATLAS Publications; T.M. Carter; A. Hasib; M.P. Heath; S. Palazzo; E.P. Takeva; N. Themistokleous; E.M. Villhauer; E. Zaid

doi:10.1007/JHEP07(2023)040

Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector

ATLAS Publications, T.M. Carter, A. Hasib, M.P. Heath, S. Palazzo, 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 Higgs boson pair production in events with two b-jets and two
τ -leptons is presented, using a proton–proton collision dataset with an integrated luminosity of 139 fb−1 collected at √s = 13 TeV by the ATLAS experiment at the LHC. Higgs boson pairs produced non-resonantly or in the decay of a narrow scalar resonance in the mass range from 251 to 1600 GeV are targeted. Events in which at least one τ -lepton decays hadronically are considered, and multivariate discriminants are used to reject the backgrounds. No significant excess of events above the expected background is observed
in the non-resonant search. The largest excess in the resonant search is observed at a resonance mass of 1 TeV, with a local (global) significance of 3.1σ (2.0σ). Observed (expected) 95% confidence-level upper limits are set on the non-resonant Higgs boson pair-production cross-section at 4.7 (3.9) times the Standard Model prediction, assuming Standard Model kinematics, and on the resonant Higgs boson pair-production cross-section at between 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.

Original language	English
Article number	40
Pages (from-to)	1-61
Number of pages	61
Journal	Journal of High Energy Physics
Volume	2023
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2023)040
Publication status	Published - 5 Jul 2023

Keywords / Materials (for Non-textual outputs)

Higgs Physics
Hadron-Hadron Scattering
Proton-Proton Scattering

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10.1007/JHEP07(2023)040Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2209.10910

1 Active
5 Finished

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., Hasib, A., Heath, M. P., Palazzo, S., Takeva, E. P., Themistokleous, N., Villhauer, E. M., & Zaid, E. (2023). Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector. Journal of High Energy Physics, 2023(7), 1-61. Article 40. https://doi.org/10.1007/JHEP07(2023)040

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title = "Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector",

abstract = "A search for Higgs boson pair production in events with two b-jets and two τ -leptons is presented, using a proton–proton collision dataset with an integrated luminosity of 139 fb−1 collected at √s = 13 TeV by the ATLAS experiment at the LHC. Higgs boson pairs produced non-resonantly or in the decay of a narrow scalar resonance in the mass range from 251 to 1600 GeV are targeted. Events in which at least one τ -lepton decays hadronically are considered, and multivariate discriminants are used to reject the backgrounds. No significant excess of events above the expected background is observed in the non-resonant search. The largest excess in the resonant search is observed at a resonance mass of 1 TeV, with a local (global) significance of 3.1σ (2.0σ). Observed (expected) 95\% confidence-level upper limits are set on the non-resonant Higgs boson pair-production cross-section at 4.7 (3.9) times the Standard Model prediction, assuming Standard Model kinematics, and on the resonant Higgs boson pair-production cross-section at between 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.",

keywords = "Higgs Physics, Hadron-Hadron Scattering, Proton-Proton Scattering",

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 A. Hasib and M.P. Heath and S. Palazzo and E.P. Takeva and N. Themistokleous and E.M. Villhauer and E. Zaid",

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doi = "10.1007/JHEP07(2023)040",

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ATLAS Publications, Carter, TM, Hasib, A, Heath, MP, Palazzo, S, Takeva, EP, Themistokleous, N, Villhauer, EM & Zaid, E 2023, 'Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector', Journal of High Energy Physics, vol. 2023, no. 7, 40, pp. 1-61. https://doi.org/10.1007/JHEP07(2023)040

TY - JOUR

T1 - Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector

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 - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Zaid, E.

PY - 2023/7/5

Y1 - 2023/7/5

N2 - A search for Higgs boson pair production in events with two b-jets and two τ -leptons is presented, using a proton–proton collision dataset with an integrated luminosity of 139 fb−1 collected at √s = 13 TeV by the ATLAS experiment at the LHC. Higgs boson pairs produced non-resonantly or in the decay of a narrow scalar resonance in the mass range from 251 to 1600 GeV are targeted. Events in which at least one τ -lepton decays hadronically are considered, and multivariate discriminants are used to reject the backgrounds. No significant excess of events above the expected background is observed in the non-resonant search. The largest excess in the resonant search is observed at a resonance mass of 1 TeV, with a local (global) significance of 3.1σ (2.0σ). Observed (expected) 95% confidence-level upper limits are set on the non-resonant Higgs boson pair-production cross-section at 4.7 (3.9) times the Standard Model prediction, assuming Standard Model kinematics, and on the resonant Higgs boson pair-production cross-section at between 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.

AB - A search for Higgs boson pair production in events with two b-jets and two τ -leptons is presented, using a proton–proton collision dataset with an integrated luminosity of 139 fb−1 collected at √s = 13 TeV by the ATLAS experiment at the LHC. Higgs boson pairs produced non-resonantly or in the decay of a narrow scalar resonance in the mass range from 251 to 1600 GeV are targeted. Events in which at least one τ -lepton decays hadronically are considered, and multivariate discriminants are used to reject the backgrounds. No significant excess of events above the expected background is observed in the non-resonant search. The largest excess in the resonant search is observed at a resonance mass of 1 TeV, with a local (global) significance of 3.1σ (2.0σ). Observed (expected) 95% confidence-level upper limits are set on the non-resonant Higgs boson pair-production cross-section at 4.7 (3.9) times the Standard Model prediction, assuming Standard Model kinematics, and on the resonant Higgs boson pair-production cross-section at between 21and 900 fb (12 and 840 fb), depending on the mass of the narrow scalar resonance.

KW - Higgs Physics

KW - Hadron-Hadron Scattering

KW - Proton-Proton Scattering

U2 - 10.1007/JHEP07(2023)040

DO - 10.1007/JHEP07(2023)040

M3 - Article

SN - 1029-8479

VL - 2023

SP - 1

EP - 61

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 40

ER -

Search for resonant and non-resonant Higgs boson pair production in the b¯bτ +τ − decay channel using 13 TeV pp collision data from the ATLAS detector

Abstract

Keywords / Materials (for Non-textual outputs)

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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