Search for phenomena beyond the Standard Model in events with large <i>b</i>-jet multiplicity using the ATLAS detector at the LHC



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2914 more authors) (2021) Search for phenomena beyond the Standard Model in events with large <i>b</i>-jet multiplicity using the ATLAS detector at the LHC. EUROPEAN PHYSICAL JOURNAL C, 81 (1). 11-.

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Abstract

A search is presented for new phenomena in events characterised by high jet multiplicity, no leptons (electrons or muons), and four or more jets originating from the fragmentation of $b$-quarks ($b$-jets). The search uses 139 fb$^{-1}$ of $\sqrt{s}$ = 13 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider during Run 2. The dominant Standard Model background originates from multijet production and is estimated using a data-driven technique based on an extrapolation from events with low $b$-jet multiplicity to the high $b$-jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits that constrain simplified models of R-parity-violating supersymmetry are determined. The exclusion limits reach 950 GeV in top-squark mass in the models considered.

Item Type: Article
Additional Information: 40 pages in total, author list starting page 24, 8 figures, 6 tables, submitted to Eur. Phys. J. C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-38/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 19 Jan 2021 11:28
Last Modified: 05 Oct 2023 11:34
DOI: 10.1140/epjc/s10052-020-08730-0
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3114167