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

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...

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Detalhes bibliográficos
Autores: Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Alconada Verzini, María Josefina, 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
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/72280
Acesso em linha:http://hdl.handle.net/11336/72280
Access Level:acceso abierto
Palavra-chave:ATLAS
CERN
HEP
LHC
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descrição
Resumo: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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