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

	PDF - Accepted Version Available under License Creative Commons Attribution. Download (627kB)
	PDF - Published Version Available under License Creative Commons Attribution. Download (2MB)

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:	02 Jul 2019 18:22
URI:	http://sro.sussex.ac.uk/id/eprint/66370

View download statistics for this item

📧 Request an update