Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector

A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb<sup>-1</sup> of proton–proton collision data recorded by the ATLAS experiment at √s = 8 TeV at the Large Hadron Collider. Five final states, targeting th...

Descripción completa

Guardado en:
Detalles Bibliográficos
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
Higgs boson
top quark
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80413
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80413
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
Higgs boson
top quark
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
Higgs boson
top quark
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
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
topic_facet Ciencias Exactas
Física
Higgs boson
top quark
proton-proton collisions
ATLAS detector
description A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb<sup>-1</sup> of proton–proton collision data recorded by the ATLAS experiment at √s = 8 TeV at the Large Hadron Collider. Five final states, targeting the decays H → WW* , ττ, and ZZ* , are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the t¯tH production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1<sup>+1.4</sup><sub>-1.2</sub> times the SM expectation, and the observed (expected) upper limit at the 95% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8σ ; the expectation in the presence of a Standard Model signal is 0.9σ .
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 Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
title_short Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
title_full Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
title_fullStr Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
title_full_unstemmed Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
title_sort search for the associated production of the higgs boson with a top quark pair in multilepton final states with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/80413
work_keys_str_mv AT alconadaverzinimariajosefina searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT alonsofrancisco searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT arduhfranciscoanuar searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT dovamariateresa searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT monticellifernandogabriel searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT wahlberghernanpablo searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
AT theatlascollaboration searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector
bdutipo_str Repositorios
_version_ 1764820486935543810

Ejemplares similares