Measurement of the tt̄W and tt̄Z production cross sections in multilepton final states using 3.2 fb−¹ of pp collisions at s√ = 13 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, (2017) Measurement of the tt̄W and tt̄Z production cross sections in multilepton final states using 3.2 fb−¹ of pp collisions at s√ = 13 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 77 (40). ISSN 1434-6044

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Abstract

A measurement of the tt̄Z and tt̄W production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton collisions at s √ =13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb −1 . The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in σ tt̄Z =0.9±0.3 pb and σ tt̄W =1.5±0.8 pb, in agreement with the Standard Model predictions.

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: 20 Jan 2017 15:19
Last Modified: 22 Aug 2017 07:15
URI: http://sro.sussex.ac.uk/id/eprint/66370

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