Search for single b*-quark production with the ATLAS detector at sqrt(s)=7 TeV

Abstract

The results of a search for an excited bottom-quark b* in pp collisions at sqrt(s)=7 TeV, using 4.7/fb of data collected by the ATLAS detector at the LHC are presented. In the model studied, a single b*-quark is produced through a chromomagnetic interaction and subsequently decays to a W boson and a top-quark. The search is performed in the dilepton and lepton+jets final states, which are combined to set limits on b*-quark couplings for a range of b*-quark masses. For a benchmark with unit size chromomagnetic and Standard Model-like electroweak b* couplings, b*-quarks with masses less than 870 GeV are excluded at the 95% credibility level.

11 pages plus author list (23 pages total), 12 figures, 2 tables, submitted to Phys. Lett. B, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2012-09/

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Cited by in corpus (11)

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• Production of extra quarks at the Large Hadron Collider beyond the Narrow Width Approximation
• Search for the production of single vector-like and excited quarks in the $Wt$ final state in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for the production of an excited bottom quark decaying to tW in proton-proton collisions at sqrt(s) = 8 TeV
• Search for single production of vectorlike $B$-quarks at the LHC
• Search for a heavy resonance decaying to a top quark and a W boson at $\sqrt{s}=$ 13 TeV in the fully hadronic final state
• Kinematic Discrimination of tW and tt Productions Using Initial State Radiation
• Determining Top Quark Couplings at the LHC: Snowmass White Paper
• Search for extra-dimensions, top-antitop resonances, 4th generation and leptoquark signatures at the LHC
• Signature of the $\gamma$+jet and dijet production mediated by an excited quark with QCD next-to-leading order accuracy at the LHC