%0 Journal Article
%T Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons
%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 109
%N 3
%I Amer Physical Soc
%@ 0031-9007
%G English
%F ATLASCollaborationAad_etal2012
%O WOS:000306604700002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1106), last updated on Fri, 24 Aug 2012 11:41:23 +0000
%X This Letter presents a search for pair production of heavy down-type quarks decaying via b' -> Wt in the lepton + jets channel, as b'(b) over bar' -> W(-)tW(+)(t) over bar -> b (b) over barW(+)W(-)W(+)W- -> l(+/-) nu b (b) over barq (q) over barq (q) over barq ($) over barq. In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04 fb(-1) from pp collisions at root s = 7 TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.
%R 10.1103/PhysRevLett.109.032001
%U http://arxiv.org/abs/1202.6540
%U https://doi.org/10.1103/PhysRevLett.109.032001
%P 032001-19pp