Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector

The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called <i>jet charge</i>, in dijet events using 20.3 fb<sup>-1</su...

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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
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87038
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87038
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
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
topic_facet Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
description The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called <i>jet charge</i>, in dijet events using 20.3 fb<sup>-1</sup> of data recorded with the ATLAS detector at √s = 8 TeV in pp collisions at the LHC. The jet charge distribution is unfolded to remove distortions from detector effects and the resulting particle-level distribution is compared with several models. The p<sub>T</sub> dependence of the jet charge distribution average and standard deviation are compared to predictions obtained with several leading-order and next-to-leading-order parton distribution functions. The data are also compared to different Monte Carlo simulations of QCD dijet production using various settings of the free parameters within these models. The chosen value of the strong coupling constant used to calculate gluon radiation is found to have a significant impact on the predicted jet charge. There is evidence for a p<sub>T</sub> dependence of the jet charge distribution for a given jet flavor. In agreement with perturbative QCD predictions, the data show that the average jet charge of quark-initiated jets decreases in magnitude as the energy of the jet increases.
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 Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
title_short Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
title_full Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
title_fullStr Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
title_full_unstemmed Measurement of jet charge in dijet events from √s = 8 TeV pp collisions with the ATLAS detector
title_sort measurement of jet charge in dijet events from √s = 8 tev pp collisions with the atlas detector
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/87038
work_keys_str_mv AT alconadaverzinimariajosefina measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
AT alonsofrancisco measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
AT arduhfranciscoanuar measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
AT dovamariateresa measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
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AT wahlberghernanpablo measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
AT theatlascollaboration measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
bdutipo_str Repositorios
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