A search is presented for heavy-quark pair production (Q (Q) over bar) under the decay hypothesis Q (Q) over bar -> W(+)qW(-)(q) over bar with q = d, s, b for up-type Q or q = u, c for down-type Q. The search is performed with 1.04 fb(-1) of integrated luminosity from pp collisions at root s = 7 TeV collected by the ATLAS detector at the CERN LHC. Dilepton final states are selected, requiring large missing transverse momentum and at least two jets. Mass reconstruction of heavy-quark candidates is performed by assuming that the W boson decay products are nearly collinear. The data are in agreement with standard model expectations; a heavy quark with mass less than 350 GeV is excluded at 95% confidence level. RI Fazio, Salvatore /G-5156-2010; Livan, Michele/D-7531-2012; Alexa, Calin/F-6345-2010; Takai, Helio/C-3301-2012; Doyle, Anthony/C-5889-2009; semprini cesari, nicola/G-7817-2012; Petrucci, Fabrizio/G-8348-2012; Smirnov, Sergei/F-1014-2011; Wemans, Andre/A-6738-2012; Jones, Roger/H-5578-2011; Ferrando, James/A-9192-2012; Fabbri, Laura/H-3442-2012; Kurashige, Hisaya/H-4916-2012; Villa, Mauro/C-9883-2009; de Groot, Nicolo/A-2675-2009; valente, paolo/A-6640-2010; Delmastro, Marco/I-5599-2012

Search for pair-produced heavy quarks decaying to Wq in the two-lepton channel at root(s)=7 TeV with the ATLAS detector

CAPUA, Marcella;Crosetti G.;Fazio S.;LA ROTONDA, Laura;MASTROBERARDINO, Anna;Meoni E.;