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Sten is a caucasian male with cropped red hair and beard.

Sten Åstrand

Doctoral student

Sten is a caucasian male with cropped red hair and beard.

Search for squarks and gluinos in pp collisions at √s = 13 TeV and 13.6 TeV in events with τ-leptons, jets and missing transverse momentum using the ATLAS detector

Author

  • G. Aad
  • T.P.A. Åkesson
  • K.S.V. Astrand
  • L. Calic
  • C. Doglioni
  • P.A. Ekman
  • V. Hedberg
  • H. Herde
  • B. Konya
  • E. Lytken
  • R. Poettgen
  • O. Smirnova
  • N. Sur
  • E.J. Wallin
  • L. Zwalinski
Show all

Summary, in English

A search for R-parity-conserving supersymmetry in events with large missing transverse momentum, jets and at least one hadronically decaying τ-lepton is presented. Both gluino and squark pair production are considered, with the cascade decay of each gluino or squark producing either a τ-slepton or a τ-sneutrino. Three channels are examined, requiring either exactly one hadronically decaying τ-lepton and no other leptons, exactly one hadronically decaying τ-lepton and at least one other lepton, or two or more hadronically decaying τ-leptons. Analyses in the three channels are optimised independently and combined statistically. Two separate analysis strategies, either a cut-and-count or machine-learning approach, are used. The search uses 140 fb-1 and 51.8 fb-1 of pp collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015–2018 at s=13 TeV and 2022–2023 at s=13.6 TeV, respectively. Gluino masses below 2.25 TeV and squark masses up to 1.7 TeV are excluded © CERN for the benefit of the ATLAS Collaboration 2025.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration
  • Department of Physics

Publishing year

2025

Language

English

Publication/Series

European Physical Journal C

Volume

85

Issue

12

Document type

Journal article

Publisher

Springer Nature

Topic

  • Subatomic Physics

Keywords

  • Colliding beam accelerators
  • Fighter aircraft
  • Learning systems
  • Supersymmetry
  • ATLAS detectors
  • Cascade decay
  • Gluinos
  • Pair production
  • Parity-conserving
  • Squarks
  • Supersymmetries
  • Three channel
  • Transverse momenta
  • Transverse momentum jets
  • Tellurium compounds

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044