Search for top squarks in events with a Higgs or <i>Z</i> boson using 139 fb<SUP>-1</SUP> of <i>pp</i> collision data at √<i>s</i>=13 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2946 more authors) (2020) Search for top squarks in events with a Higgs or <i>Z</i> boson using 139 fb<SUP>-1</SUP> of <i>pp</i> collision data at √<i>s</i>=13 TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 80 (11). 1080-.

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Abstract

This paper presents a search for direct top squark pair production in events with missing transverse momentum plus either a pair of jets consistent with Standard Model Higgs boson decay into $b$-quarks or a same-flavour opposite-sign dilepton pair with an invariant mass consistent with a $Z$ boson. The analysis is performed using the proton-proton collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector during the LHC Run-2, corresponding to an integrated luminosity of 139 fb$^{-1}$. No excess is observed in the data above the Standard Model predictions. The results are interpreted in simplified models featuring direct production of pairs of either the lighter top squark ($\tilde{t}_1$) or the heavier top squark ($\tilde{t}_2$), excluding at 95% confidence level $\tilde{t}_1$ and $\tilde{t}_2$ masses up to about 1220 and 875 GeV, respectively.

Item Type: Article
Additional Information: 48 pages in total, author list starting page 32, 12 figures, 12 tables, published in Eur. Phys. J. C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-21
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 14 Dec 2020 10:17
Last Modified: 18 Oct 2023 08:34
DOI: 10.1140/epjc/s10052-020-08469-8
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3110216