Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector

Measurements of normalized differential crosssections of top-quark pair production are presented as a function of the top-quark, t¯t system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of √s = 8 TeV. The observables have been chosen to emphasize the t¯...

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Detalles Bibliográficos
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: 2016
Materias:
Ciencias Exactas
Física
top-quark
ATLAS detector
proton-proton collisions
leptons
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79245
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79245
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
ATLAS detector
proton-proton collisions
leptons
spellingShingle Ciencias Exactas
Física
top-quark
ATLAS detector
proton-proton collisions
leptons
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
topic_facet Ciencias Exactas
Física
top-quark
ATLAS detector
proton-proton collisions
leptons
description Measurements of normalized differential crosssections of top-quark pair production are presented as a function of the top-quark, t¯t system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of √s = 8 TeV. The observables have been chosen to emphasize the t¯t production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb−1, recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.
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 Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
title_short Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
title_full Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
title_fullStr Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
title_full_unstemmed Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector
title_sort measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 tev using the atlas detector
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/79245
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AT alonsofrancisco measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
AT arduhfranciscoanuar measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
AT dovamariateresa measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
AT monticellifernandogabriel measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
AT wahlberghernanpablo measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
AT theatlascollaboration measurementsoftopquarkpairdifferentialcrosssectionsintheleptonjetschannelinppcollisionsats8tevusingtheatlasdetector
bdutipo_str Repositorios
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