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
; Alonso, Francisco ; Arduh, Francisco Anuar ; Dova, Maria Teresa ; Monticelli, Fernando Gabriel ; Wahlberg, Hernan Pablo ; Bossio Sola, Jonathan David ; Marceca, Gino ; Otero y Garzon, Gustavo Javier ; Piegaia, Ricardo Nestor ; Sacerdoti, Sabrina ; Zibell. A. ; Zieminska, D. ; Zimine, N. I. ; Zimmermann, C. ; Zimmermann, S. ; Zinonos, Z. ; Zinser, M. ; Ziolkowski, M. ; Živković, L. ; Zobernig, G. ; Zoccoli, A. ; Nedden, M. zur ; Zurzolo, G. ; Zwalinski, L. ; The ATLAS Collaboration Otros responsables
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09/2017
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Springer
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European Physical Journal C: Particles and Fields
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1434-6044
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Inglés
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Resumen
A measurement of the t t ̄ Z and t 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 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 t t ̄ Z = 0.9 ± 0.3 pb and σ t t ̄ W = 1.5 ± 0.8 pb, in agreement with the Standard Model predictions.
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Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; et al.; 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; Springer; European Physical Journal C: Particles and Fields; 77; 9-2017; 40
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