%0 Journal Article %T Search for Pair Production of a Heavy Up-Type Quark Decaying to a W Boson and a b Quark in the lepton plus jets Channel with the ATLAS Detector %A ATLAS Collaboration (Aad, G. et al %A Amoros, G. %A Cabrera Urban, S. %A Castillo Gimenez, V. %A Costa, M. J. %A Ferrer, A. %A Fiorini, L. %A Fuster, J. %A Garcia, C. %A Garcia Navarro, J. E. %A Gonzalez de la Hoz, S. %A Hernandez Jimenez, Y. %A Higon-Rodriguez, E. %A Irles Quiles, A. %A Kaci, M. %A Lacasta, C. %A Lacuesta, V. R. %A Marti-Garcia, S. %A Miñano, M. %A Mitsou, V. A. %A Moles-Valls, R. %A Moreno Llacer, M. %A Oliver Garcia, E. %A Perez Garcia-Estañ, M. T. %A Romero Adam, E. %A Ros, E. %A Salt, J. %A Sanchez Martinez, V. %A Solans, C. A. %A Soldevila, U. %A Sanchez, J. %A Torro Pastor, E. %A Valladolid Gallego, E. %A Valls Ferrer, J. A. %A Villaplana Perez, M. %A Vos, M. %A Wildauer, A. %J Physical Review Letters %D 2012 %V 108 %N 26 %I Amer Physical Soc %@ 0031-9007 %G English %F ATLASCollaborationAad_etal2012 %O WOS:000305689400013 %O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1062), last updated on Thu, 12 Jul 2012 11:20:48 +0000 %X A search is presented for production of a heavy up-type quark (t') together with its antiparticle, assuming subsequent decay to a W boson and a b quark, t'(t) over bar' -> W(+)bW(-)(b) over bar. The search is based on 1.04 fb(-1) of proton-proton collisions at root s = 7 TeV collected by the ATLAS detector at the CERN Large Hadron Collider. Data are analyzed in the lepton + jets final state, characterized by a high transverse momentum isolated electron or muon, high missing transverse momentum, and at least three jets. No significant excess of events above the background expectation is observed. A 95% C.L. lower limit of 404 GeV is set for the mass of the t' quark. %R 10.1103/PhysRevLett.108.261802 %U http://arxiv.org/abs/arXiv:1202.3076 %U https://doi.org/10.1103/PhysRevLett.108.261802 %P 261802 - 18pp