Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV

The mass of the top quark is measured in a data set corresponding to 4.6 fb<sup>-1</sup> of proton–proton collisions with centre-of-mass energy √ = 7 TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets i...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
ATLAS
Fully hadronic
LHC
Proton–proton collisions
Top quark
Top-quark mass
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86811
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86811
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
ATLAS
Fully hadronic
LHC
Proton–proton collisions
Top quark
Top-quark mass
spellingShingle Ciencias Exactas
Física
ATLAS
Fully hadronic
LHC
Proton–proton collisions
Top quark
Top-quark mass
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
topic_facet Ciencias Exactas
Física
ATLAS
Fully hadronic
LHC
Proton–proton collisions
Top quark
Top-quark mass
description The mass of the top quark is measured in a data set corresponding to 4.6 fb<sup>-1</sup> of proton–proton collisions with centre-of-mass energy √ = 7 TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top–antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of mt = 175.1 ± 1.4 (stat.) ± 1.2 (syst.) GeV.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
title_short Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
title_full Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
title_fullStr Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
title_full_unstemmed Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s = 7 TeV
title_sort measurement of the top-quark mass in the fully hadronic decay channel from atlas data at √s = 7 tev
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86811
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