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Search for long-lived, massive particles in events with displaced vertices and multiple jets in pp collisions at √s = 13 TeV with the ATLAS detector

Aad, G. ; Åkesson, T.P.A. LU orcid ; Corrigan, E.E. LU ; Doglioni, C. LU ; Ekman, P.A. LU ; Geisen, J. LU orcid ; Hedberg, V. LU ; Herde, H. LU orcid ; Jarlskog, G. LU and Konya, B. LU , et al. (2023) In Journal of High Energy Physics 2023(6).
Abstract
A search for long-lived particles decaying into hadrons is presented. The analysis uses 139 fb−1 of pp collision data collected at s = 13 TeV by the ATLAS detector at the LHC using events that contain multiple energetic jets and a displaced vertex. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particles decaying in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are used to set limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and on... (More)
A search for long-lived particles decaying into hadrons is presented. The analysis uses 139 fb−1 of pp collision data collected at s = 13 TeV by the ATLAS detector at the LHC using events that contain multiple energetic jets and a displaced vertex. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particles decaying in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are used to set limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and on scenarios with pair-production of supersymmetric particles with long-lived electroweakinos that decay via a small R-parity-violating coupling. The pair-production of electroweakinos with masses below 1.5 TeV is excluded for mean proper lifetimes in the range from 0.03 ns to 1 ns. When produced in the decay of m(g~) = 2.4 TeV gluinos, electroweakinos with m(χ~10) = 1.5 TeV are excluded with lifetimes in the range of 0.02 ns to 4 ns. [Figure not available: see fulltext.]. © 2023, The Author(s). (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Beyond Standard Model, Hadron-Hadron Scattering, Supersymmetry
in
Journal of High Energy Physics
volume
2023
issue
6
article number
200
publisher
Springer
external identifiers
  • scopus:85166271763
ISSN
1029-8479
DOI
10.1007/JHEP06(2023)200
language
English
LU publication?
yes
id
70bab3a1-2b28-451f-9a8f-2a56c6d0c599
date added to LUP
2023-12-20 15:49:06
date last changed
2023-12-20 15:49:06
@article{70bab3a1-2b28-451f-9a8f-2a56c6d0c599,
  abstract     = {{A search for long-lived particles decaying into hadrons is presented. The analysis uses 139 fb−1 of pp collision data collected at s = 13 TeV by the ATLAS detector at the LHC using events that contain multiple energetic jets and a displaced vertex. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particles decaying in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are used to set limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and on scenarios with pair-production of supersymmetric particles with long-lived electroweakinos that decay via a small R-parity-violating coupling. The pair-production of electroweakinos with masses below 1.5 TeV is excluded for mean proper lifetimes in the range from 0.03 ns to 1 ns. When produced in the decay of m(g~) = 2.4 TeV gluinos, electroweakinos with m(χ~10) = 1.5 TeV are excluded with lifetimes in the range of 0.02 ns to 4 ns. [Figure not available: see fulltext.]. © 2023, The Author(s).}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Corrigan, E.E. and Doglioni, C. and Ekman, P.A. and Geisen, J. and Hedberg, V. and Herde, H. and Jarlskog, G. and Konya, B. and Lytken, E. and Mjörnmark, J.U. and Poettgen, R. and Simpson, N.D. and Skorda, E. and Smirnova, O. and Zwalinski, L.}},
  issn         = {{1029-8479}},
  keywords     = {{Beyond Standard Model; Hadron-Hadron Scattering; Supersymmetry}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Search for long-lived, massive particles in events with displaced vertices and multiple jets in pp collisions at √s = 13 TeV with the ATLAS detector}},
  url          = {{http://dx.doi.org/10.1007/JHEP06(2023)200}},
  doi          = {{10.1007/JHEP06(2023)200}},
  volume       = {{2023}},
  year         = {{2023}},
}