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Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at with the ATLAS detector at the LHC

Aad, G ; Abbott, B ; Abdallah, J ; Abdel Khalek, S ; Abdelalim, A A ; Abdesselam, A ; Abdinov, O ; Abi, B ; Abolins, M ; AbouZeid, O S ; Et. Al

Physics letters. B, 2012-03, Vol.710 (1), p.49-66 [Periódico revisado por pares]

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  • Título:
    Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at with the ATLAS detector at the LHC
  • Autor: Aad, G ; Abbott, B ; Abdallah, J ; Abdel Khalek, S ; Abdelalim, A A ; Abdesselam, A ; Abdinov, O ; Abi, B ; Abolins, M ; AbouZeid, O S ; Et. Al
  • Assuntos: Collision dynamics ; Confidence intervals ; Elementary particles ; Equivalence ; Higgs bosons ; Searching ; Standard deviation
  • É parte de: Physics letters. B, 2012-03, Vol.710 (1), p.49-66
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    content type line 23
    ObjectType-Feature-1
  • Descrição: A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb-1 to 4.9 fb-1 of pp collisions collected at s = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around m H similar to 126 GeV with a local significance of 3.5 standard deviations ( sigma ). The local significances of H arrow right gamma gamma , H arrow right Z Z ( * ) arrow right [ell] + [ell] - [ell] ' + [ell] ' - and H arrow right W W ( * ) arrow right [ell] + nu [ell] ' - nu [macr] , the three most sensitive channels in this mass range, are 2.8 sigma , 2.1 sigma and 1.4 sigma , respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be similar to 1.4 % or, equivalently, 2.2 sigma .
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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