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Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb−1 of √s=13 TeV pp collision data with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 28632017 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, article id 84Article in journal (Refereed) Published
Abstract [en]

A search for strongly produced supersymmetric particles using signatures involving multiple energetic jets and either two isolated same-sign leptons (e or μ), or at least three isolated leptons, is presented. The analysis relies on the identification of b-jets and high missing transverse momentum to achieve good sensitivity. A data sample of proton-proton collisions at s=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to a total integrated luminosity of 36.1 fb−1, is used for the search. No significant excess over the Standard Model prediction is observed. The results are interpreted in several simplified supersymmetric models featuring R-parity conservation or R-parity violation, extending the exclusion limits from previous searches. In models considering gluino pair production, gluino masses are excluded up to 1.87 TeV at 95% confidence level. When bottom squarks are pair-produced and decay to a chargino and a top quark, models with bottom squark masses below 700 GeV and light neutralinos are excluded at 95% confidence level. In addition, model-independent limits are set on a possible contribution of new phenomena to the signal region yields.[Figure not available: see fulltext.].

Place, publisher, year, edition, pages
Springer, 2017. no 9, article id 84
Keywords [en]
Hadron-Hadron scattering (experiments)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-220442ISI: 000417789700001Scopus ID: 2-s2.0-85029855064OAI: oai:DiVA.org:kth-220442DiVA, id: diva2:1168221
Note

QC 20171213

Available from: 2017-12-20 Created: 2017-12-20 Last updated: 2018-01-09Bibliographically approved

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Lund-Jensen, BengtRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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