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

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

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ATLAS Collaboration; Mitsou, Vasiliki; Fuster Verdú, Juan A. Perfil; Ferrer Soria, Antonio Perfil; Cabrera Urbán, Susana Perfil; García García, Carmen Perfil; Castillo Giménez, María Victoria Perfil; Higón Rodríguez, Emilio Perfil; Martí García, Salvador; Ros Martínez, Eduardo; González de la Hoz, Santiago Perfil; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio; Kaci, Mohammed; Fiorini, Luca; Hernández Jiménez, Yesenia; Lacasta Llácer, Carlos; Villaplana Pérez, Miguel
Aquest document és un/a article, creat/da en: 2012

Este documento está disponible también en : http://dx.doi.org/10.1016/j.physletb.2012.03.082
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, pp -> Qq -> Wqq' and pp -> Qq -> Zqq' with a leptonic decay of the vector gauge boson. In 1.04 fb(-1) of data taken in 2011 by the ATLAS experiment at a center-of-mass energy root 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 K-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.

    ATLAS Collaboration Mitsou, Vasiliki Fuster Verdú, Juan A. Ferrer Soria, Antonio Cabrera Urbán, Susana García García, Carmen Castillo Giménez, María Victoria Higón Rodríguez, Emilio Martí García, Salvador Ros Martínez, Eduardo González de la Hoz, Santiago Salt Cairols, José Valls Ferrer, Juan Antonio Kaci, Mohammed Fiorini, Luca Hernández Jiménez, Yesenia Lacasta Llácer, Carlos Villaplana Pérez, Miguel 2012 Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at root s=7 TeV with the ATLAS detector Physics Letters B 712 1-2 22 39
http://dx.doi.org/10.1016/j.physletb.2012.03.082
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