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Title

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

CollaborationWith : Akilli, Ece / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Coccaro, Andrea / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Jansky, Roland / Katre, Akshay / Khoo, Teng Jian / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nackenhorst, Olaf / Nessi, Marzio / Paolozzi, Lorenzo / Schramm, Steven / Sfyrla, Anna / Valente, Marco / Wu, Xin
Published in Journal of High Energy Physics. 2017, vol. 1709, p. 084-129
Collection Open Access - SCOAP3
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 √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.
Keywords Hadron-Hadron scattering (experiments)Supersymmetry
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arXiv: 1706.03731
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ATLAS COLLABORATION. 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. In: Journal of High Energy Physics, 2017, vol. 1709, p. 084-129. https://archive-ouverte.unige.ch/unige:97178

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Deposited on : 2017-10-02

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