Search for direct top squark pair production in final states with two tau leptons in pp collisions at s√ = 8 TeV with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2016) Search for direct top squark pair production in final states with two tau leptons in pp collisions at s√ = 8 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 76 (2). p. 81. ISSN 1434-6044

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Abstract

A search for direct pair production of the supersymmetric partner of the top quark, decaying via a scalar tau to a nearly massless gravitino, has been performed using 20 fb −1 −1 of proton–proton collision data at s √ =8 TeV s=8 TeV. The data were collected by the ATLAS experiment at the LHC in 2012. Top squark candidates are searched for in events with either two hadronically decaying tau leptons, one hadronically decaying tau and one light lepton, or two light leptons. No significant excess over the Standard Model expectation is found. Exclusion limits at 95 % 95 % confidence level are set as a function of the top squark and scalar tau masses. Depending on the scalar tau mass, ranging from the 87 GeV 87 GeV LEP limit to the top squark mass, lower limits between 490 and 650 GeV 650 GeV are placed on the top squark mass within the model considered.

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: Richard Chambers
Date Deposited: 15 Feb 2017 11:11
Last Modified: 23 Mar 2017 18:53
URI: http://sro.sussex.ac.uk/id/eprint/66759

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Project NameSussex Project NumberFunderFunder Ref
STFC Consolidated Grant SupplementG1316STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M000753/1