Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector
A search for the Standard Model Higgs boson produced in association with a top-quark pair, ttH, is presented. The analysis uses 20.3 fb-1 of pp collision data at √s = 8 TeV, collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the H → bb decay mode a...
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Autores principales: | , , , , , , |
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2015
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/86853 |
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I19-R120-10915-86853 |
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Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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SEDICI (UNLP) |
language |
Inglés |
topic |
Física Proton–proton collisions Higgs boson |
spellingShingle |
Física Proton–proton collisions Higgs boson Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
topic_facet |
Física Proton–proton collisions Higgs boson |
description |
A search for the Standard Model Higgs boson produced in association with a top-quark pair, ttH, is presented. The analysis uses 20.3 fb-1 of pp collision data at √s = 8 TeV, collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the H → bb decay mode and uses events containing one or two electrons or muons. In order to improve the sensitivity of the search, events are categorised according to their jet and b-tagged jet multiplicities. A neural network is used to discriminate between signal and background events, the latter being dominated by tt+jets production. In the single-lepton channel, variables calculated using a matrix element method are included as inputs to the neural network to improve discrimination of the irreducible tt+bb background. No significant excess of events above the background expectation is found and an observed (expected) limit of 3.4 (2.2) times the StandardModel cross section is obtained at 95% confidence level. The ratio of the measured ttH signal cross section to the StandardModel expectation is found to be µ = 1.5±1.1 assuming a Higgs boson mass of 125 GeV. |
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 Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
title_short |
Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
title_full |
Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
title_fullStr |
Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
title_full_unstemmed |
Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector |
title_sort |
search for the standard model higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 tev with the atlas detector |
publishDate |
2015 |
url |
http://sedici.unlp.edu.ar/handle/10915/86853 |
work_keys_str_mv |
AT alconadaverzinimariajosefina searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT alonsofrancisco searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT arduhfranciscoanuar searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT dovamariateresa searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT monticellifernandogabriel searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT wahlberghernanpablo searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector AT theatlascollaboration searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingintobbinppcollisionsats8tevwiththeatlasdetector |
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Repositorios |
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1764820489396551684 |