Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector

A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb−1 of proton–proton collision data at √s = 7 TeV collected with the ATLAS detector at the LHC. Data sampleswith enriched quark or gluon content are used in the construction a...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Exactas
Física
quarks
gluon
ATLAS detector
proton-proton collision
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/72958
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-72958
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
quarks
gluon
ATLAS detector
proton-proton collision
spellingShingle Ciencias Exactas
Física
quarks
gluon
ATLAS detector
proton-proton collision
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
quarks
gluon
ATLAS detector
proton-proton collision
description A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb−1 of proton–proton collision data at √s = 7 TeV collected with the ATLAS detector at the LHC. Data sampleswith enriched quark or gluon content are used in the construction and validation of templates of jet properties that are the input to the likelihood-based discriminant. The discriminating power of the jet tagger is established in both data and Monte Carlo samples within a systematic uncertainty of ≈ 10–20 %. In data, light-quark jets can be tagged with an efficiency of ≈ 50% while achieving a gluon-jet mis-tag rate of ≈ 25% in a pT range between 40 GeV and 360 GeV for jets in the acceptance of the tracker. The rejection of gluon-jets found in the data is significantly below what is attainable using a Pythia 6Monte Carlo simulation, where gluon-jet mis-tag rates of 10% can be reached for a 50% selection efficiency of light-quark jets using the same jet properties.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
title_short Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
title_full Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Light-quark and gluon jet discrimination in pp collisions at √s = 7 TeV with the ATLAS detector
title_sort light-quark and gluon jet discrimination in pp collisions at √s = 7 tev with the atlas detector
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/72958
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bdutipo_str Repositorios
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