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Search for Light Long-Lived Particles in Formula Presented Collisions at Formula Presented Using Displaced Vertices in the ATLAS Inner Detector

Aad, G. ; Åkesson, T.P.A. LU orcid ; Astrand, K.S.V. LU ; Doglioni, C. LU ; Ekman, P.A. LU orcid ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid and Poettgen, R. LU orcid , et al. (2024) In Physical Review Letters 133(16).
Abstract
A search for long-lived particles (LLPs) using Formula Presented of Formula Presented collision data with Formula Presented recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS inner detector. Benchmark models with LLP pair production from exotic decays of the Higgs boson and models featuring long-lived axionlike particles (ALPs) are considered. No significant excess above the expected background is observed. Upper limits are placed on the branching ratio of the Higgs boson to pairs of LLPs, the cross section for ALPs produced in association with a vector boson, and, for the first time, on the branching ratio of the top quark to an ALP and a... (More)
A search for long-lived particles (LLPs) using Formula Presented of Formula Presented collision data with Formula Presented recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS inner detector. Benchmark models with LLP pair production from exotic decays of the Higgs boson and models featuring long-lived axionlike particles (ALPs) are considered. No significant excess above the expected background is observed. Upper limits are placed on the branching ratio of the Higgs boson to pairs of LLPs, the cross section for ALPs produced in association with a vector boson, and, for the first time, on the branching ratio of the top quark to an ALP and a Formula Presented quark. © 2024 CERN, for the ATLAS Collaboration. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hadrons, ATLAS experiment, Benchmark models, Branching ratio, Exotic decay, Higgs boson, Higgs model, Inner Detector, Pair production, Particle pair, Upper limits, Bosons
in
Physical Review Letters
volume
133
issue
16
article number
161803
publisher
American Physical Society
external identifiers
  • scopus:85209936207
  • pmid:39485965
ISSN
0031-9007
DOI
10.1103/PhysRevLett.133.161803
language
English
LU publication?
yes
id
30c145b7-b62a-4c8b-99a9-803377779cce
date added to LUP
2025-09-30 11:27:50
date last changed
2025-10-14 12:01:17
@article{30c145b7-b62a-4c8b-99a9-803377779cce,
  abstract     = {{A search for long-lived particles (LLPs) using Formula Presented of Formula Presented collision data with Formula Presented recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS inner detector. Benchmark models with LLP pair production from exotic decays of the Higgs boson and models featuring long-lived axionlike particles (ALPs) are considered. No significant excess above the expected background is observed. Upper limits are placed on the branching ratio of the Higgs boson to pairs of LLPs, the cross section for ALPs produced in association with a vector boson, and, for the first time, on the branching ratio of the top quark to an ALP and a Formula Presented quark. © 2024 CERN, for the ATLAS Collaboration.}},
  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         = {{0031-9007}},
  keywords     = {{Hadrons; ATLAS experiment; Benchmark models; Branching ratio; Exotic decay; Higgs boson; Higgs model; Inner Detector; Pair production; Particle pair; Upper limits; Bosons}},
  language     = {{eng}},
  number       = {{16}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Search for Light Long-Lived Particles in Formula Presented Collisions at Formula Presented Using Displaced Vertices in the ATLAS Inner Detector}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.133.161803}},
  doi          = {{10.1103/PhysRevLett.133.161803}},
  volume       = {{133}},
  year         = {{2024}},
}