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

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Benhar Noccioli, Eleonora / Bucci, Francesca / Clark, Allan Geoffrey / Doglioni, Caterina / Ferrere, Didier / Gadomski, Szymon / Gonzalez Sevilla, Sergio / Goulette, Marc / Iacobucci, Giuseppe / La Rosa, Alessandro / Lister, Alison / Martin Dit Latour, Bertrand / Mermod, Philippe / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pasztor, Arpad / Picazio, Attilio / Pohl, Martin / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in Physics Letters. B. 2013, vol. 721, no. 4-5, p. 171-189
Abstract The results of a search for an excited bottom-quark b⁎b⁎ in pp collisions at √s=7 TeV, using 4.7 fb−14.7 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 GeV870 GeV are excluded at the 95% credibility level.
Keywords ATLASB*Single top-quarkExcited quark
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ATLAS COLLABORATION. Search for single b*-quark production with the ATLAS detector at √s = 7 TeV. In: Physics Letters. B, 2013, vol. 721, n° 4-5, p. 171-189. doi: 10.1016/j.physletb.2013.03.016 https://archive-ouverte.unige.ch/unige:38972

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Deposited on : 2014-07-28

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