Search for R-parity-violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using √s=13 TeV proton-proton collision data

A search for R-parity-violating supersymmetry in final states characterized by high jet multiplicity, at least one isolated light lepton and either zero or at least three b-tagged jets is presented. The search uses $${139}\,{\text {fb}^{-1}}$$of $$\sqrt{s} = {13}\hbox { TeV}$$proton-proton collision...

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Hauptverfasser: Aad, Georges (VerfasserIn) , Andrei, George Victor (VerfasserIn) , Bartels, Falk (VerfasserIn) , Castillo, Florencia Luciana (VerfasserIn) , Czurylo, Marta (VerfasserIn) , Dittmeier, Sebastian (VerfasserIn) , Dunford, Monica (VerfasserIn) , Franchino, Silvia (VerfasserIn) , Klassen, Martin (VerfasserIn) , Krishnan, Anjali (VerfasserIn) , Mkrtchyan, Tigran (VerfasserIn) , Napolitano, Fabrizio (VerfasserIn) , Ott, Philipp (VerfasserIn) , Rassloff, Damir Fabrice (VerfasserIn) , Rodriguez Bosca, Sergi (VerfasserIn) , Sauer, Christof (VerfasserIn) , Schöning, André (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Spieker, Thomas (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Starovoitov, Pavel (VerfasserIn) , Vigani, Luigi (VerfasserIn) , Weber, Sebastian (VerfasserIn) , Wessels, Martin (VerfasserIn) , Yue, Xiaoguang (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 23 November 2021
In: The European physical journal. C, Particles and fields
Year: 2021, Jahrgang: 81, Heft: 11, Pages: 1-39
ISSN:1434-6052
DOI:10.1140/epjc/s10052-021-09761-x
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-021-09761-x
Volltext
Verfasserangaben:ATLAS Collaboration

MARC

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520 |a A search for R-parity-violating supersymmetry in final states characterized by high jet multiplicity, at least one isolated light lepton and either zero or at least three b-tagged jets is presented. The search uses $${139}\,{\text {fb}^{-1}}$$of $$\sqrt{s} = {13}\hbox { TeV}$$proton-proton collision data collected by the ATLAS experiment during Run 2 of the Large Hadron Collider. The results are interpreted in the context of R-parity-violating supersymmetry models that feature gluino production, top-squark production, or electroweakino production. The dominant sources of background are estimated using a data-driven model, based on observables at medium jet multiplicity, to predict the b-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. Machine-learning techniques are used to reach sensitivity to electroweakino production, extending the data-driven background estimation to the shape of the machine-learning discriminant. No significant excess over the Standard Model expectation is observed and exclusion limits at the 95% confidence level are extracted, reaching as high as 2.4 TeV in gluino mass, 1.35 TeV in top-squark mass, and 320 (365) GeV in higgsino (wino) mass. 
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