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Title
Japanese:Measurement of the tt?Z and tt?W production cross sections in multilepton final states using 3.2 fb -1 of pp collisions at s = 13 TeV with the ATLAS detector 
English:Measurement of the tt?Z and tt?W production cross sections in multilepton final states using 3.2 fb -1 of pp collisions at s = 13 TeV with the ATLAS detector 
Author
Japanese: M. Aaboud, 陣内 修, 久世 正弘, 山口 洋平, et al..  
English: M. Aaboud, Osamu Jinnouchi, Masahiro.Kuze, Youhei Yamaguchi, et al..  
Language English 
Journal/Book name
Japanese:European Physical Journal C 
English:European Physical Journal C 
Volume, Number, Page Vol. 77    No. 1    pp. "40"
Published date Jan. 2017 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://www.scopus.com/inward/record.uri?eid=2-s2.0-85011866957&doi=10.1140%2fepjc%2fs10052-016-4574-y&partnerID=40&md5=ef6740fe03e05149167e6c864e72ffe4
 
DOI https://doi.org/10.1140/epjc/s10052-016-4574-y
Abstract A measurement of the $t\bar{t}Z$ and $t\bar{t}W$ 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 $\sqrt{s} = 13$ 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 $\sigma _{t\bar{t}Z} = 0.9 \pm 0.3$ ?pb and $\sigma _{t\bar{t}W} = 1.5 \pm 0.8$ ?pb, in agreement with the Standard Model

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