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Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV pp collisions with the ATLAS detector

Aad, G. ; Åkesson, T.P.A. LU orcid ; Astrand, K.S.V. LU ; Doglioni, C. LU ; Ekman, P.A. LU ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid and Poettgen, R. LU orcid , et al. (2024) In European Physical Journal C 84(7).
Abstract
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q=u,c) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark along with Higgs boson decays into two W bosons, two Z bosons or a τ+τ- pair. It focuses on final states containing either two leptons (electrons or muons) of the same charge or three leptons. The considered processes are tt¯ and Ht production. For the tt¯ production, one top quark decays via t→Hq. The proton–proton collision data set analysed amounts to (140fb-1) at (s=13TeV). No significant excess beyond Standard Model expectations is observed and upper limits are set on the t→Hq branching... (More)
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q=u,c) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark along with Higgs boson decays into two W bosons, two Z bosons or a τ+τ- pair. It focuses on final states containing either two leptons (electrons or muons) of the same charge or three leptons. The considered processes are tt¯ and Ht production. For the tt¯ production, one top quark decays via t→Hq. The proton–proton collision data set analysed amounts to (140fb-1) at (s=13TeV). No significant excess beyond Standard Model expectations is observed and upper limits are set on the t→Hq branching ratios at 95 % confidence level, amounting to observed (expected) limits of B(t→Hu) (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Tellurium compounds, ATLAS detectors, Branching ratio, Final state, Flavor changing neutral currents, Higgs boson, Large Hadron Collider, Large-hadron colliders, Neutral current interactions, Top quarks, Upper limits, Bosons
in
European Physical Journal C
volume
84
issue
7
article number
757
publisher
Springer Nature
external identifiers
  • scopus:85200554324
ISSN
1434-6044
DOI
10.1140/epjc/s10052-024-12994-1
language
English
LU publication?
yes
id
3d849f06-c6f2-4337-a8dc-1d6427658c6c
date added to LUP
2024-09-11 13:42:09
date last changed
2025-04-04 14:38:44
@article{3d849f06-c6f2-4337-a8dc-1d6427658c6c,
  abstract     = {{A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q=u,c) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark along with Higgs boson decays into two W bosons, two Z bosons or a τ+τ- pair. It focuses on final states containing either two leptons (electrons or muons) of the same charge or three leptons. The considered processes are tt¯ and Ht production. For the tt¯ production, one top quark decays via t→Hq. The proton–proton collision data set analysed amounts to (140fb-1) at (s=13TeV). No significant excess beyond Standard Model expectations is observed and upper limits are set on the t→Hq branching ratios at 95 % confidence level, amounting to observed (expected) limits of B(t→Hu)}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Astrand, K.S.V. 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 Smirnova, O. and Wallin, E.J. and Zwalinski, L.}},
  issn         = {{1434-6044}},
  keywords     = {{Tellurium compounds; ATLAS detectors; Branching ratio; Final state; Flavor changing neutral currents; Higgs boson; Large Hadron Collider; Large-hadron colliders; Neutral current interactions; Top quarks; Upper limits; Bosons}},
  language     = {{eng}},
  number       = {{7}},
  publisher    = {{Springer Nature}},
  series       = {{European Physical Journal C}},
  title        = {{Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV pp collisions with the ATLAS detector}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-024-12994-1}},
  doi          = {{10.1140/epjc/s10052-024-12994-1}},
  volume       = {{84}},
  year         = {{2024}},
}