Abstract
A measurement of the tt¯Z and tt¯W 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 σtt¯Z=0.9±0.3pb and σtt¯W=1.5±0.8pb, in agreement with the Standard Model predictions.
Original language | English |
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Article number | 40 |
Pages (from-to) | 1-29 |
Number of pages | 29 |
Journal | European Physical Journal C: Particles and Fields |
Volume | 77 |
Early online date | 20 Jan 2017 |
DOIs | |
Publication status | Published - Jan 2017 |