Search for direct production of electroweakinos in fnal states with one lepton, jets and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector
department or school: Science, Faculty of
department or school: TRIUMF
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department or school: Physics and Astronomy, Department of
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identifier citation: Journal of High Energy Physics. 2023 Dec 27;2023(12):167
rights copyright: The Author(s)
creator: ATLAS Collaboration
issued: 2024-10-24T22:58:47Z
issued: 2023-12-27
description: Searches for electroweak production of wino-like chargino pairs, χ˜ + 1 χ˜ − 1 , and of wino-like chargino and next-to-lightest neutralino, χ˜ ± 1 χ˜ 0 2 , are presented. The models explored assume that the charginos decay into a W boson and the lightest neutralino, χ˜ ± 1 → W±χ˜ 0 1 . The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to χ˜ 0 1 and either a Z or a Higgs boson, χ˜ 0 2 → Zχ˜ 0 1 or hχ˜ 0 1 . The searches exploit the presence of a single isolated lepton and missing transverse momentum from the W boson decay products and the lightest neutralinos, and the presence of jets from hadronically decaying Z or W bosons or from the Higgs boson decaying into a pair of b-quarks. The searches use 139 fb−1 of √ s = 13 TeV proton-proton collisions data collected by the ATLAS detector at the Large Hadron Collider between 2015 and 2018. No deviations from the Standard Model expectations are found, and 95% confdence level exclusion limits are set. Chargino masses ranging from 260 to 520 GeV are excluded for a massless χ˜ 0 1 in chargino pair production models. Degenerate chargino and next-to-lightest neutralino masses ranging from 260 to 420 GeV are excluded for a massless χ˜ 0 1 for χ˜ 0 2 → Zχ˜ 0 1 . For decays through an on-shell Higgs boson and for mass-splitting between χ˜ ± 1 /χ˜ 0 2 and χ˜ 0 1 as small as the Higgs boson mass, mass limits are improved by up to 40 GeV in the range of 200–260 GeV and 280–470 GeV compared to previous ATLAS constraints.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89532
note: JHEP12(2023)167PuAlished for SISS Ay SpringerReceived: October 13, 2023Accepted: December 14, 2023Published: December 27, 2023Search for direct production of electroweakinos in finalstates with one lepton, jets and missing transversemomentum in pp collisions at √s = 13TeV with theATLAS detectorThe ATLAS collaborationE-mail: atlas.publications@cern.chAbstract: Searches for electroweak production of wino-like chargino pairs, χ˜+1 χ˜−1 , and ofwino-like chargino and next-to-lightest neutralino, χ˜±1 χ˜02, are presented. The models exploredassume that the charginos decay into a W boson and the lightest neutralino, χ˜±1 →W±χ˜01.The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to χ˜01 andeither a Z or a Higgs boson, χ˜02 → Zχ˜01 or hχ˜01. The searches exploit the presence of a singleisolated lepton and missing transverse momentum from the W boson decay products and thelightest neutralinos, and the presence of jets from hadronically decaying Z orW bosons or fromthe Higgs boson decaying into a pair of b-quarks. The searches use 139 fb−1 of√s = 13TeVproton-proton collisions data collected by the ATLAS detector at the Large Hadron Colliderbetween 2015 and 2018. No deviations from the Standard Model expectations are found, and95% confidence level exclusion limits are set. Chargino masses ranging from 260 to 520GeVare excluded for a massless χ˜01 in chargino pair production models. Degenerate chargino andnext-to-lightest neutralino masses ranging from 260 to 420GeV are excluded for a masslessχ˜01 for χ˜02 → Zχ˜01. For decays through an on-shell Higgs boson and for mass-splitting betweenχ˜±1 /χ˜02 and χ˜01 as small as the Higgs boson mass, mass limits are improved by up to 40GeVin the range of 200–260GeV and 280–470GeV compared to previous ATLAS constraints.Keywords: Hadron-Hadron Scattering, SupersymmetryArXiv ePrint: 2310.08171Open Access, Copyright CERN,for the benefit of the ATLAS Collaboration.Article funded by SCOAP3.https://doi.org/10.10…
has type: Article
is shown at: 10.14288/1.0447094
language: eng
peer review status: Reviewed
provider: Vancouver : University of British Columbia Library
publisher: Springer Berlin Heidelberg
publisher DOI: 10.1007/JHEP12(2023)167
rights: Attribution 4.0 International (CC BY 4.0)
rights URI: http://creativecommons.org/licenses/by/4.0/
scholar level: Faculty
subject: Hadron-Hadron Scattering
subject: Supersymmetry
type: Text
identifier URI: http://hdl.handle.net/2429/89532