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...
Autores principales: | , , , , , , |
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2015
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79116 |
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I19-R120-10915-79116 |
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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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1764820487192444930 |