Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector

The four-lepton (4, = e,μ) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb−1 of data in pp collisions at √s = 8 TeV collected with the ATLAS detector at the LHC. The 4 events are produced in the decays of resonant Z and Higgs bosons and the non- resonant Z Z...

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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: 2015
Materias:
Ciencias Exactas
Física
Atlas detector
lepton production
pp collisions
LHC
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/74858
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-74858
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 detector
lepton production
pp collisions
LHC
spellingShingle Ciencias Exactas
Física
Atlas detector
lepton production
pp collisions
LHC
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
Atlas detector
lepton production
pp collisions
LHC
description The four-lepton (4, = e,μ) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb−1 of data in pp collisions at √s = 8 TeV collected with the ATLAS detector at the LHC. The 4 events are produced in the decays of resonant Z and Higgs bosons and the non- resonant Z Z continuum originating from qq ̄, gg, and qg initial states. A total of 476 signal candidate events are observed with a background expectation of 26.2 ± 3.6 events, enabling the measurement of the integrated cross section and the differential cross section as a function of the invariant mass and transverse momentum of the four-lepton system. In the mass range above 180 GeV, assuming the theoretical constraint on the qq ̄ production cross section calculated with perturbative NNLO QCD and NLO electroweak corrections, the signal strength of the gluon-fusion component relative to its leading-order prediction is determined to be μgg = 2.4 ± 1.0 (stat.) ± 0.5 (syst.) ± 0.8 (theory).
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 four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
title_short Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
title_full Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
title_fullStr Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
title_full_unstemmed Measurements of four-lepton production in pp collisions at √ s = 8 TeV with the ATLAS detector
title_sort measurements of four-lepton production in pp collisions at √ s = 8 tev with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/74858
work_keys_str_mv AT alconadaverzinimariajosefina measurementsoffourleptonproductioninppcollisionsats8tevwiththeatlasdetector
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