Search for single b*-quark production with the ATLAS detector at root s=7 TeV
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KünyeAad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R. ... ATLAS Collaboration. (2013). Search for single b*-quark production with the ATLAS detector at root s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 721(4-5), 171-189. http://dx.doi.org/10.1016/j.physletb.2013.03.016
The results of a search for an excited bottom-quark b*in pp collisions at s=7 TeV, using 4.7 fb-1of 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.