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Search for resonant top quark plus jet production in tt + jets events with the ATLAS detector in pp collisions at √s=7  TeV

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Benhar Noccioli, Eleonora / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / 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 Physical Review Letters. 2012, vol. 86, no. 09, p. 091103
Abstract This paper presents a search for a new heavy particle produced in association with a top or antitop quark. Two models in which the new heavy particle is a color singlet or a color triplet are considered, decaying, respectively, to tq or tq, leading to a resonance within the tt+jets signature. The full 2011 ATLAS pp collision data set from the LHC (4.7  fb−1) is used to search for tt events produced in association with jets, in which one of the W bosons from the top quarks decays leptonically and the other decays hadronically. The data are consistent with the Standard Model expectation, and a new particle with mass below 430 Gev for both W′ boson and color triplet models is excluded at 95% confidence level, assuming unit right-handed coupling.
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ATLAS COLLABORATION. Search for resonant top quark plus jet production in tt + jets events with the ATLAS detector in pp collisions at √s=7  TeV. In: Physical Review Letters, 2012, vol. 86, n° 09, p. 091103. https://archive-ouverte.unige.ch/unige:40004

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Deposited on : 2014-09-05

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