Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector

The inclusive and fiducial t¯t production crosssections are measured in the lepton+jets channel using 20.2 fb−1 of proton–proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Exactas
Física
top quark
quantum chromodynamics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82303
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82303
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
top quark
quantum chromodynamics
spellingShingle Ciencias Exactas
Física
top quark
quantum chromodynamics
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
top quark
quantum chromodynamics
description The inclusive and fiducial t¯t production crosssections are measured in the lepton+jets channel using 20.2 fb−1 of proton–proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale and b-tagging efficiency are constrained by separating selected events into three disjoint regions. In order to reduce systematic uncertainties in the most important background, the W+jets process is modelled using Z+jets events in a data-driven approach. The inclusive t¯t cross-section is measured with a precision of 5.7% to be σinc(t¯t) = 248.3±0.7 (stat.)±13.4 (syst.)±4.7 (lumi.) pb, assuming a top-quark mass of 172.5 GeV. The result is in agreement with the Standard Model prediction. The crosssection is also measured in a phase space close to that of the selected data. The fiducial cross-section is σfid(t¯t) = 48.8±0.1 (stat.)±2.0 (syst.)±0.9 (lumi.) pb with a precision of 4.5%.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
title_short Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
title_full Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
title_fullStr Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
title_full_unstemmed Measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV with the ATLAS detector
title_sort measurement of the inclusive and fiducial t¯t production cross-sections in the lepton+jets channel in pp collisions at √s = 8 tev with the atlas detector
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/82303
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