Measurement of the inclusive cross-sections of single top-quark and top-antiquark t-channel production in pp collisions at s√ = 13 TeV with the ATLAS detector

A measurement of the t-channel single-top-quark and single-top-antiquark production cross- sections in the lepton+jets channel is presented, using 3.2 fb −1 of proton?proton collision data at a centre-of-mass energy of 13 TeV, recorded with the ATLAS detector at the LHC in 2015. Events are selected...

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Detalles Bibliográficos
Autores: Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, Maria Teresa, Hoya, Joaquín, 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
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/66238
Acceso en línea:http://hdl.handle.net/11336/66238
Access Level:acceso abierto
Palabra clave:top
Cross-section
ATLAS
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:A measurement of the t-channel single-top-quark and single-top-antiquark production cross- sections in the lepton+jets channel is presented, using 3.2 fb −1 of proton?proton collision data at a centre-of-mass energy of 13 TeV, recorded with the ATLAS detector at the LHC in 2015. Events are selected by requiring one charged lepton (electron or muon), missing trans- verse momentum, and two jets with high transverse momentum, exactly one of which is re- quired to be b-tagged. Using a binned maximum-likelihood fit to the discriminant distribution of a neural network, the cross-sections are determined to be σ(tq) = 156±5 (stat.)±27 (syst.)± 3 (lumi.) pb for single top-quark production and σ( t  ̄ q) = 91±4 (stat.)±18 (syst.)±2 (lumi.) pb for single top-antiquark production, assuming a top-quark mass of 172.5 GeV. The cross- section ratio is measured to be R t = σ(tq)/σ( t  ̄ q) = 1.72 ± 0.09 (stat.) ± 0.18 (syst.). All results are in agreement with Standard Model predictions.

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