Cargando…

Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV

A search for a Higgs boson produced in association with a pair of top quarks ($tar{t}H$) and decaying into a pair of bottom quarks ($H o bar{b}$) is presented. The analysis uses 4.7~fb$^{-1}$ of $pp$ collision data at $sqrt{s}=7 ev$ collected in 2011 with the ATLAS detector at the CERN Large Hadron...

Descripción completa

Detalles Bibliográficos
Autor principal: Montejo Berlingen, J
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:https://dx.doi.org/10.1051/epjconf/20136020028
http://cds.cern.ch/record/1559257
_version_ 1780930611697942528
author Montejo Berlingen, J
author_facet Montejo Berlingen, J
author_sort Montejo Berlingen, J
collection CERN
description A search for a Higgs boson produced in association with a pair of top quarks ($tar{t}H$) and decaying into a pair of bottom quarks ($H o bar{b}$) is presented. The analysis uses 4.7~fb$^{-1}$ of $pp$ collision data at $sqrt{s}=7 ev$ collected in 2011 with the ATLAS detector at the CERN Large Hadron Collider. The search is focused on the semileptonic decay mode of the $tar{t}$ system which, together with the $H o bar{b}$ decay, typically results in a final state signature characterised by one high transverse momentum isolated electron or muon, high transverse missing momentum and six jets, of which four jets originate from $b$ quarks. Events are classified in nine different topologies depending on their jet and $b$-tagged jet multiplicities in order to improve the sensitivity of the search. No significant excess of events above the background expectation is observed and 95% confidence-level upper limits on the production cross section times branching ratio, $sigma(tar{t}H) imes BR(H o bar{b})$, are derived for a Higgs boson with a mass between 110 and 140~gev. For a Higgs boson with a mass of 125~gev, an observed (expected) 95% confidence-level upper limit of 13.1 (10.5) times the Standard Model cross section is obtained.
id cern-1559257
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15592572022-08-10T20:42:50Zdoi:10.1051/epjconf/20136020028http://cds.cern.ch/record/1559257engMontejo Berlingen, JSearch for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeVDetectors and Experimental TechniquesA search for a Higgs boson produced in association with a pair of top quarks ($tar{t}H$) and decaying into a pair of bottom quarks ($H o bar{b}$) is presented. The analysis uses 4.7~fb$^{-1}$ of $pp$ collision data at $sqrt{s}=7 ev$ collected in 2011 with the ATLAS detector at the CERN Large Hadron Collider. The search is focused on the semileptonic decay mode of the $tar{t}$ system which, together with the $H o bar{b}$ decay, typically results in a final state signature characterised by one high transverse momentum isolated electron or muon, high transverse missing momentum and six jets, of which four jets originate from $b$ quarks. Events are classified in nine different topologies depending on their jet and $b$-tagged jet multiplicities in order to improve the sensitivity of the search. No significant excess of events above the background expectation is observed and 95% confidence-level upper limits on the production cross section times branching ratio, $sigma(tar{t}H) imes BR(H o bar{b})$, are derived for a Higgs boson with a mass between 110 and 140~gev. For a Higgs boson with a mass of 125~gev, an observed (expected) 95% confidence-level upper limit of 13.1 (10.5) times the Standard Model cross section is obtained.ATL-PHYS-PROC-2013-198oai:cds.cern.ch:15592572013-07-02
spellingShingle Detectors and Experimental Techniques
Montejo Berlingen, J
Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title_full Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title_fullStr Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title_full_unstemmed Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title_short Search for the Standard Model Higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 TeV
title_sort search for the standard model higgs boson produced in association with top quarks and decaying to $\bar{b}$ at $\sqrt{s}$ = 7 tev
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1051/epjconf/20136020028
http://cds.cern.ch/record/1559257
work_keys_str_mv AT montejoberlingenj searchforthestandardmodelhiggsbosonproducedinassociationwithtopquarksanddecayingtobarbatsqrts7tev