Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb−1 of sqrt(s) = 13 TeV pp collision data with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2017) Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb−1 of sqrt(s) = 13 TeV pp collision data with the ATLAS detector. Journal of High Energy Physics, 84. ISSN 1126-6708

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

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 sqrt(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.

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
Related URLs:
Depositing User: Iacopo Vivarelli
Date Deposited: 29 Aug 2017 10:52
Last Modified: 02 Oct 2017 15:03
URI: http://sro.sussex.ac.uk/id/eprint/69933

View download statistics for this item

📧 Request an update