Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions

The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the t¯t + 1-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79092
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id I19-R120-10915-79092
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
hadron-hadron scattering
top physics
top quark
spellingShingle Ciencias Exactas
Física
hadron-hadron scattering
top physics
top quark
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
topic_facet Ciencias Exactas
Física
hadron-hadron scattering
top physics
top quark
description The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the t¯t + 1-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation depends on the mass of the quarks. The experimental analysis is based on proton-proton collision data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 7TeV corresponding to an integrated luminosity of 4.6 fb−1. The selected events were identified using the lepton+jets top-quark-pair decay channel, where lepton refers to either an electron or a muon. The observed distribution is compared to a theoretical prediction at next-to-leading-order accuracy in quantum chromodynamics using the pole-mass scheme. With this method, the measured value of the top-quark pole mass, mpole t , is: mpole t = 173.7 ± 1.5 (stat.) ± 1.4 (syst.) +1.0 −0.5 (theory) GeV. This result represents the most precise measurement of the top-quark pole mass to date.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
title_short Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
title_full Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
title_fullStr Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
title_full_unstemmed Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions
title_sort determination of the top-quark pole mass using t¯t + 1-jet events collected with the atlas experiment in 7tev pp collisions
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/79092
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