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Search for heavy vector-like quarks coupling to light quarks in proton–proton collisions at s=7 TeV with the ATLAS detector

Aad, G. ; Abbott, B. ; Abdallah, J. ; Abdel Khalek, S. ; Abdelalim, A.A. ; Abdesselam, A. ; Abdinov, O. ; Abi, B. ; Abolins, M. ; Abouzeid, O.S. ; Abramowicz, H. ; Abreu, H. ; Acerbi, E. ; Acharya, B.S. ; Adamczyk, L. ; Adams, D.L. ; Addy, T.N. ; Adelman, J. ; Aderholz, M. ; Adomeit

Physics Letters B, 05/2012, Vol.712(1-2), pp.22-39 [Periódico revisado por pares]

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  • Título:
    Search for heavy vector-like quarks coupling to light quarks in proton–proton collisions at s=7 TeV with the ATLAS detector
  • Autor: Aad, G. ; Abbott, B. ; Abdallah, J. ; Abdel Khalek, S. ; Abdelalim, A.A. ; Abdesselam, A. ; Abdinov, O. ; Abi, B. ; Abolins, M. ; Abouzeid, O.S. ; Abramowicz, H. ; Abreu, H. ; Acerbi, E. ; Acharya, B.S. ; Adamczyk, L. ; Adams, D.L. ; Addy, T.N. ; Adelman, J. ; Aderholz, M. ; Adomeit
  • Assuntos: High Energy Physics - Experiment
  • É parte de: Physics Letters B, 05/2012, Vol.712(1-2), pp.22-39
  • Descrição: This letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, p p --> Q q --> W q q' and p p --> Q q --> Z q q' with a leptonic decay of the vector gauge boson. In 1.04/fb of data taken in 2011 by the ATLAS experiment at a center-of-mass energy sqrt(s) = 7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m_Q are obtained. For a coupling kappa_(qQ) = v/m_Q, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively. Comment: 7 pages plus author list (18 pages total), 3 figures, 3 tables, revised author list, matches Physics Letters B version
  • Idioma: Inglês

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