Abraham, N L, Allbrooke, B, Asquith, L, Cerri, A, DeSanto, A, Salvatore, F, Shaw, K, Stevenson, T, Suruliz, K, Sutton, M, Vivarelli, I, ATLAS Collaboration, and others, (2018) Search for electroweak production of supersymmetric particles in final states with two or three leptons at √s=1113 TeV with the ATLAS detector. European Physical Journal C, 78 (995). pp. 1-36. ISSN 1434-6044

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Abstract

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 √s = 13 TeV proton– proton 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 massdegenerate sleptons.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects:	Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User:	Iacopo Vivarelli
Date Deposited:	01 Mar 2019 15:18
Last Modified:	01 Mar 2019 15:19
URI:	http://srodev.sussex.ac.uk/id/eprint/82240

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