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Search for top-philic heavy resonances in pp collisions at s=13 TeV with the ATLAS detector

Aad, G. ; Åkesson, T.P.A. LU orcid ; Doglioni, C. LU ; Ekman, P.A. LU ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid ; Poettgen, R. LU orcid and Simpson, N.D. LU , et al. (2024) In European Physical Journal C 84(2).
Abstract
A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a tt¯ pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at s=13 TeV at the Large Hadron Collider during the years 2015–2018, corresponding to an integrated luminosity of 139 fb-1. Events containing exactly one electron or muon are selected. The two hadronically decaying top quarks from the resonance decay are reconstructed using jets clustered with a large radius parameter of R=1. The invariant mass spectrum of the two top quark candidates is used to search for a resonance signal in the range of 1.0 TeV to 3.2 TeV. The presence of a signal is examined using an approach with... (More)
A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a tt¯ pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at s=13 TeV at the Large Hadron Collider during the years 2015–2018, corresponding to an integrated luminosity of 139 fb-1. Events containing exactly one electron or muon are selected. The two hadronically decaying top quarks from the resonance decay are reconstructed using jets clustered with a large radius parameter of R=1. The invariant mass spectrum of the two top quark candidates is used to search for a resonance signal in the range of 1.0 TeV to 3.2 TeV. The presence of a signal is examined using an approach with minimal model dependence followed by a model-dependent interpretation. No significant excess is observed over the background expectation. Upper limits on the production cross section times branching ratio at 95% confidence level are provided for a heavy Z′ boson based on a simplified model, for Z′ mass between 1.0 TeV and 3.0 TeV. The observed (expected) limits range from 21 (14) fb to 119 (86) fb depending on the choice of model parameters. © The Author(s) 2024. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Tellurium compounds, ATLAS detectors, Integrated luminosity, Invariant-mass spectra, Large Hadron Collider, Large-hadron colliders, Minimal model, Resonance decay, Resonance signals, Top quarks, Upper limits, Mass spectrometry
in
European Physical Journal C
volume
84
issue
2
article number
157
publisher
Springer
external identifiers
  • scopus:85191340022
ISSN
1434-6044
DOI
10.1140/epjc/s10052-023-12318-9
language
English
LU publication?
yes
id
b308f89c-c0ea-44dd-8f56-88fe1e003e49
date added to LUP
2024-05-03 13:22:05
date last changed
2024-05-03 13:22:53
@article{b308f89c-c0ea-44dd-8f56-88fe1e003e49,
  abstract     = {{A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a tt¯ pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at s=13 TeV at the Large Hadron Collider during the years 2015–2018, corresponding to an integrated luminosity of 139 fb-1. Events containing exactly one electron or muon are selected. The two hadronically decaying top quarks from the resonance decay are reconstructed using jets clustered with a large radius parameter of R=1. The invariant mass spectrum of the two top quark candidates is used to search for a resonance signal in the range of 1.0 TeV to 3.2 TeV. The presence of a signal is examined using an approach with minimal model dependence followed by a model-dependent interpretation. No significant excess is observed over the background expectation. Upper limits on the production cross section times branching ratio at 95% confidence level are provided for a heavy Z′ boson based on a simplified model, for Z′ mass between 1.0 TeV and 3.0 TeV. The observed (expected) limits range from 21 (14) fb to 119 (86) fb depending on the choice of model parameters. © The Author(s) 2024.}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Simpson, N.D. and Skorda, E. and Smirnova, O. and Zwalinski, L.}},
  issn         = {{1434-6044}},
  keywords     = {{Tellurium compounds; ATLAS detectors; Integrated luminosity; Invariant-mass spectra; Large Hadron Collider; Large-hadron colliders; Minimal model; Resonance decay; Resonance signals; Top quarks; Upper limits; Mass spectrometry}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Search for top-philic heavy resonances in pp collisions at s=13 TeV with the ATLAS detector}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-023-12318-9}},
  doi          = {{10.1140/epjc/s10052-023-12318-9}},
  volume       = {{84}},
  year         = {{2024}},
}