Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector

The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √s = 8TeV. The dataset corresponds to an integrated luminosity of 20.3 fb-1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
electroweak interaction
hadron-hadron scattering
top physics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79116
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79116
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
electroweak interaction
hadron-hadron scattering
top physics
spellingShingle Ciencias Exactas
Física
electroweak interaction
hadron-hadron scattering
top physics
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
electroweak interaction
hadron-hadron scattering
top physics
description The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √s = 8TeV. The dataset corresponds to an integrated luminosity of 20.3 fb-1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the t¯tW and t¯tZ processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for t¯tW (t¯tZ) production. The measured cross sections are t¯tW = 369+100 -91 fb and t¯tZ = 176+58 -52 fb. The background-only hypothesis with neither t¯tW nor t¯tZ production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the t¯tW and t¯tZ processes.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
title_short Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
title_full Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
title_fullStr Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
title_full_unstemmed Measurement of the t¯tW and t¯tZ production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
title_sort measurement of the t¯tw and t¯tz production cross sections in pp collisions at √s = 8 tev with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/79116
work_keys_str_mv AT alconadaverzinimariajosefina measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT alonsofrancisco measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT arduhfranciscoanuar measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT dovamariateresa measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT monticellifernandogabriel measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT wahlberghernanpablo measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
AT theatlascollaboration measurementofthettwandttzproductioncrosssectionsinppcollisionsats8tevwiththeatlasdetector
bdutipo_str Repositorios
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