Search for long-lived neutral particles in pp collisions at √<i>s</i>=13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2912 more authors) (2019) Search for long-lived neutral particles in pp collisions at √<i>s</i>=13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter. EUROPEAN PHYSICAL JOURNAL C, 79 (6). 481-.

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Abstract

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 GeV and 400 GeV, produced from decays of heavy bosons with masses between 125 GeV 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.

Item Type: Article
Additional Information: Comments: 47 pages in total, author list starting page 31, 10 figures, 3 tables, submitted to EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2017-25
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 08 Jul 2019 15:56
Last Modified: 06 Oct 2023 10:14
DOI: 10.1140/epjc/s10052-019-6962-6
Open Access URL: https://epjc.epj.org/articles/epjc/abs/2019/06/100...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3048175