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Search for long-lived neutral particles in pp collisions at $${\sqrt{s}} = 13~{\text { TeV}}$$ that decay into displaced hadronic jets in the ATLAS calorimeter

M. AaboudCERN, 1211 Geneva 23, SwitzerlandG. AadCERN, 1211 Geneva 23, SwitzerlandB. AbbottCERN, 1211 Geneva 23, SwitzerlandD. C. AbbottCERN, 1211 Geneva 23, SwitzerlandO. AbdinovCERN, 1211 Geneva 23, SwitzerlandD. K. AbhayasingheCERN, 1211 Geneva 23, SwitzerlandHaider AbidiCERN, 1211 Geneva 23, SwitzerlandO. S. AbouZeidCERN, 1211 Geneva 23, SwitzerlandN. L. AbrahamDepartment of Physics and Astronomy, University of Sussex, Brighton, UKH. AbramowiczRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, IsraelH. AbreuCERN, 1211 Geneva 23, SwitzerlandY. AbulaitiHigh Energy Physics Division, Argonne National Laboratory, Argonne, IL, USAB. S. AcharyaCERN, 1211 Geneva 23, SwitzerlandS. AdachiCERN, 1211 Geneva 23, SwitzerlandL. AdámekCERN, 1211 Geneva 23, SwitzerlandL. AdamczykCERN, 1211 Geneva 23, SwitzerlandJahred AdelmanCERN, 1211 Geneva 23, SwitzerlandM. AdersbergerCERN, 1211 Geneva 23, SwitzerlandAytul AdiguzelDepartment of Physics, Bogazici University, Istanbul, USATim AdyeCERN, 1211 Geneva 23, SwitzerlandTony AffolderCERN, 1211 Geneva 23, SwitzerlandY. AfikDepartment of Physics, Technion, Israel Institute of Technology, Haifa, IsraelC. AgapopoulouUniversité Paris-SaclayMerve Nazlim AgarasLaboratoire de Physique de Clermont AuvergneAnamika AggarwalCERN, 1211 Geneva 23, SwitzerlandC. AgheorghieseiCERN, 1211 Geneva 23, SwitzerlandJ. A. Aguilar–SaavedraCERN, 1211 Geneva 23, SwitzerlandF. AhmadovJoint Institute for Nuclear Research, Dubna, RussiaGiulio AielliINFN Sezione di Roma Tor Vergata, Rome, ItalyS. AkatsukaCERN, 1211 Geneva 23, SwitzerlandTorsten AkessonFysiska institutionen, Lunds universitet, Lund, SwedenE. AkilliCERN, 1211 Geneva 23, SwitzerlandAndrei AkimovP.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, RussiaK. Al KhouryCERN, 1211 Geneva 23, SwitzerlandGian Luigi AlberghiCERN, 1211 Geneva 23, SwitzerlandJ. AlbertDepartment of Physics and Astronomy, University of Victoria, Victoria, BC, CanadaM. J. Alconada VerziniUniversidad Nacional de La PlataSara AlderweireldtInstitute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, The NetherlandsM. AleksaCERN, 1211 Geneva 23, SwitzerlandI. N. AleksandrovJoint Institute for Nuclear Research, Dubna, RussiaC. AlexaCERN, 1211 Geneva 23, SwitzerlandD. AlexandreCERN, 1211 Geneva 23, SwitzerlandT. AlexopoulosCERN, 1211 Geneva 23, SwitzerlandMuhammad AlhroobHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USABabar AliPhysics Department, National Technical University of Athens, Zografou, GreeceGianluca AlimontiCERN, 1211 Geneva 23, SwitzerlandJ. AlisonCERN, 1211 Geneva 23, SwitzerlandS. P. AlkireDepartment of Physics, University of Washington, Seattle, WA, USAC. AllaireCERN, 1211 Geneva 23, SwitzerlandBenedict AllbrookeCERN, 1211 Geneva 23, SwitzerlandB. W. AllenCenter for High Energy Physics, University of Oregon, Eugene, OR, USAPhilip Patrick AllportSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKA. AloisioINFN Sezione di Napoli, Naples, ItalyA. AlonsoCERN, 1211 Geneva 23, SwitzerlandF. AlonsoInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaCristiano AlpigianiDepartment of Physics, University of Washington, Seattle, WA, USAA. A. AlshehriCERN, 1211 Geneva 23, SwitzerlandM. I. AlstatyEuropean Organization for Nuclear ResearchM. Alvarez EstevezDepartamento de Física Teorica C-15 and CIAFF, Universidad Autónoma de Madrid, Madrid, SpainB. Álvarez GonzálezCERN, 1211 Geneva 23, SwitzerlandD. Álvarez PiquerasEuropean Organization for Nuclear ResearchM. G. AlviggiCERN, 1211 Geneva 23, SwitzerlandY. Amaral CoutinhoUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, RussiaAlessandro AmblerCERN, 1211 Geneva 23, SwitzerlandL. AmbrozCERN, 1211 Geneva 23, SwitzerlandC. AmelungDepartment of Physics, Brandeis University, Waltham, MA, USADante AmideiDepartment of Physics, University of Michigan, Ann Arbor, MI, USAS. P. Amor Dos SantosS. AmorosoDeutsches Elektronen-Synchrotron DESY, Hamburg and Zeuthen, GermanyC. S. AmroucheDépartement de Physique Nucléaire et Corpusculaire, Université de Genève, Genève, SwitzerlandF. F. AnCERN, 1211 Geneva 23, SwitzerlandChristos AnastopoulosCERN, 1211 Geneva 23, SwitzerlandN. AndariCEA Paris-SaclayT. AndeenDepartment of Physics, University of Texas at Austin, Austin, TX, USAC. F. AndersPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyJohn Kenneth AndersCERN, 1211 Geneva 23, SwitzerlandA. AndreazzaINFN Sezione di Milano, Milan, ItalyV. AndreiKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, ChinaC. R. AnelliDepartment of Physics and Astronomy, University of Victoria, Victoria, BC, CanadaS. AngelidakisEuropean Organization for Nuclear ResearchI. AngelozziCERN, 1211 Geneva 23, SwitzerlandAaron AngeramiNevis Laboratory, Columbia University, Irvington, NY, USAAlexey AnisenkovCERN, 1211 Geneva 23, SwitzerlandA. AnnoviCERN, 1211 Geneva 23, SwitzerlandC. AntelKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, ChinaM. T. AnthonyCERN, 1211 Geneva 23, SwitzerlandM. AntonelliINFN e Laboratori Nazionali di Frascati, Frascati, ItalyD. J. A. AntrimCERN, 1211 Geneva 23, SwitzerlandFabio AnulliCERN, 1211 Geneva 23, SwitzerlandMasato AokiCERN, 1211 Geneva 23, SwitzerlandJ. A. Aparisi PozoEuropean Organization for Nuclear ResearchL. Aperio BellaCERN, 1211 Geneva 23, SwitzerlandG. ArabidzeDepartment of Physics and Astronomy, Michigan State University, East Lansing, MI, USAJ. P. AraqueCERN, 1211 Geneva 23, SwitzerlandV. Araujo FerrazCERN, 1211 Geneva 23, SwitzerlandR. Araujo PereiraUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, RussiaA. T. H. ArceCERN, 1211 Geneva 23, SwitzerlandF. A. ArduhInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaJ-F. ArguinGroup of Particle Physics, University of Montreal, Montreal, QC, Canada

2019en

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Litsenziya: cc-by

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Annotatsiya

This paper describes a search for pairs of neutral, long-lived particles decaying in the ATLAS calorimeter. Long-lived particles occur in many extensions to the Standard Model and may elude searches for new promptly decaying particles. The analysis considers neutral, long-lived scalars with masses between 5 and 400 GeV, produced from decays of heavy bosons with masses between 125 and 1000 GeV, where the long-lived scalars decay into Standard Model fermions. The analysis uses either 10.8 fb -1 or 33.0 fb -1 of data (depending on the trigger) recorded in 2016 at the LHC with the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV. No significant excess is observed, and limits are reported on the production cross section times branching ratio as a function of the proper decay length of the long-lived particles.

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DOI: 10.1140/epjc/s10052-019-6962-6

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