The results of a search for an excited bottom-quark b* in pp collisions at root s = 7 TeV, using 4.7 fb(-1) 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. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S.a., Abdelalim, A.a., et al. (2013). Search for single b*-quark production with the ATLAS detector at root s=7 TeV. PHYSICS LETTERS. SECTION B, 721(4-5), 171-189 [10.1016/j.physletb.2013.03.016].

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

CERADINI, Filippo;DI MICCO, Biagio;Di Nardo R;ORESTANO, DOMIZIA;PETRUCCI, FABRIZIO;SALAMANNA, GIUSEPPE;