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


Aad G., Aakvaag E., Abbott B., Abdelhameed S., Abeling K., Abicht N. J., ...More

EUROPEAN PHYSICAL JOURNAL C, vol.85, no.12, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 85 Issue: 12
  • Publication Date: 2025
  • Doi Number: 10.1140/epjc/s10052-025-14957-6
  • Journal Name: EUROPEAN PHYSICAL JOURNAL C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
  • Istanbul University Affiliated: Yes

Abstract

A search for R-parity-conserving supersymmetry in events with large missing transverse momentum, jets and at least one hadronically decaying tau-lepton is presented. Both gluino and squark pair production are considered, with the cascade decay of each gluino or squark producing either a tau-slepton or a tau-sneutrino. Three channels are examined, requiring either exactly one hadronically decaying tau-lepton and no other leptons, exactly one hadronically decaying tau-lepton and at least one other lepton, or two or more hadronically decaying tau-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 root s=13 TeV and 2022-2023 at root s=13.6 TeV, respectively. Gluino masses below 2.25 TeV and squark masses up to 1.7 TeV are excluded