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Search for electroweak production of supersymmetric particles in final states with two or three leptons at root s=13 Tev with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-6945-1916
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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Number of Authors: 28682018 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, no 12, article id 995Article in journal (Refereed) Published
Abstract [en]

A search for the electroweak production of charginos, neutralinos and sleptons decaying into final states involving two or three electrons or muons is presented. The analysis is based on 36.1 fb(-1) of root s = 13 TeV protonproton collisions recorded by the ATLAS detector at the Large Hadron Collider. Several scenarios based on simplified models are considered. These include the associated production of the next-to-lightest neutralino and the lightest chargino, followed by their decays into final states with leptons and the lightest neutralino via either sleptons or Standard Model gauge bosons; direct production of chargino pairs, which in turn decay into leptons and the lightest neutralino via intermediate sleptons; and slepton pair production, where each slepton decays directly into the lightest neutralino and a lepton. No significant deviations from the Standard Model expectation are observed and stringent limits at 95% confidence level are placed on the masses of relevant supersymmetric particles in each of these scenarios. For a massless lightest neutralino, masses up to 580 GeV are excluded for the associated production of the next-to-lightest neutralino and the lightest chargino, assuming gauge-boson mediated decays, whereas for slepton-pair production masses up to 500 GeV are excluded assuming three generations of mass-degenerate sleptons.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 78, no 12, article id 995
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Physical Sciences
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URN: urn:nbn:se:kth:diva-241160DOI: 10.1140/epjc/s10052-018-6423-7ISI: 000452335500003OAI: oai:DiVA.org:kth-241160DiVA, id: diva2:1278787
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QC 20180115

Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2019-08-09Bibliographically approved

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Kastanas, Konstatinos A.Ripellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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Kastanas, Konstatinos A.Lund-Jensen, BengtRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas
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