A search for the decays of stopped long-lived particles at root s=13 TeV with the ATLAS detector
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Hadron-Hadron scattering (experiments)
The ATLAS collaboration., Aad, G., Abbott, B. et al. A search for the decays of stopped long-lived particles at s√ = 13 TeV with the ATLAS detector. J. High Energ. Phys. 2021, 173 (2021). [https://doi.org/10.1007/JHEP07(2021)173]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation; National Natural Science Foundation of China (NSFC); Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Ministry of Education, Youth & Sports - Czech Republic; MPO CR; Czech Republic Government; DNRF; Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; Federal Ministry of Education & Research (BMBF); Max Planck Society; Greek Ministry of Development-GSRT; RGC and Hong Kong SAR, China; Israel Science Foundation Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; CNRST, Morocco; NWO, Netherlands; RCN, Norway; Ministry of Science and Higher Education, Poland NCN, Poland; Portuguese Foundation for Science and Technology European Commission; MNE/IFA, Romania; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia MIZS, Slovenia; Spanish Government; SRC; Wallenberg Foundation, Sweden; Swiss National Science Foundation (SNSF); Ministry of Science and Technology, Taiwan; Ministry of Energy & Natural Resources - Turkey; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF; CANARIE; Beijing Municipal Science & Technology Commission; COST, ERC European Commission Marie Sklodowska-Curie Actions, European Union; French National Research Agency (ANR); German Research Foundation (DFG) European Commission Alexander von Humboldt Foundation; Greek NSRF, Greece; BSF-NSF; German-Israeli Foundation for Scientific Research and Development; La Caixa Foundation CERCA Programme Generalitat de Catalunya PROMETEO Generalitat Valenciana Goran Gustafssons Stiftelse, Sweden; Royal Society of London; European Commission; Leverhulme Trust; NDGF (Denmark, Norway, Sweden); KIT/GridKA (Germany); INFN-CNAF (Italy); NL-T1 (Netherlands), PIC (Spain); ASGC (Taiwan); BNL (U.S.A.)
A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters. These decays are detected using data collected during periods in the LHC bunch structure when collisions are absent. The analysed dataset is composed of events from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy of root s = 13TeV and recorded by the ATLAS experiment during 2017 and 2018. The dataset used for this search corresponds to a total live time of 579 hours. The results of this search are used to derive lower limits on the mass of gluino R-hadrons, assuming a branching fraction B((g) over tilde -> q (q) over bar(chi) over tilde (0)(1)) = 100%, with masses of up to 1.4TeV excluded for gluino lifetimes of 10(-5) to 10(3) s.