Search for top squarks decaying to tau sleptons in pp collisions at √s=13  TeV with the ATLAS detector

Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Shaw, K, Chavez Barajas, C A, De Santo, A, Jones, S, Lerner, G, Miano, F, Salvatore, F, Santoyo Castillo, I, Shehu, C YH, Stevenson, T, Suruliz, K, Sutton, M R, Tresoldi, F, Vivarelli, I, Winkels, E, Winston, O L, The ATLAS Collaboration, and others, (2018) Search for top squarks decaying to tau sleptons in pp collisions at √s=13  TeV with the ATLAS detector. Physical Review D, 98 (3). 32008 1-33. ISSN 2470-0010

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A search for direct pair production of top squarks in final states with two tau leptons, b -jets, and missing transverse momentum is presented. The analysis is based on proton-proton collision data at s √ =13 TeV corresponding to an integrated luminosity of 36.1 fb −1 recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. Two exclusive channels with either two hadronically decaying tau leptons or one hadronically and one leptonically decaying tau lepton are considered. No significant deviation from the Standard Model predictions is observed in the data. The analysis results are interpreted in terms of model-independent limits and used to derive exclusion limits on the masses of the top squark t ~ 1 and the tau slepton τ ~ 1 in a simplified model of supersymmetry with a nearly massless gravitino. In this model, masses up to m(t ~ 1 )=1.16 TeV and m(τ ~ 1 )=1.00 TeV are excluded at 95% confidence level.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Alice Jackson
Date Deposited: 09 Nov 2018 15:02
Last Modified: 02 Jul 2019 13:04

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