/ Experiment-HEP arXiv:1301.1583

Search for single $b^*$-quark production with the ATLAS detector at $\sqrt{s}=7$ TeV

Pages: 11

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.

Keyword(s): ATLAS ; b* ; single top-quark ; excited quark

Note: * Temporary entry *; 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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