1202.3076 (ATLAS Collaboration)

Search for pair production of a heavy quark decaying to a W boson and a
b quark in the lepton+jets channel with the ATLAS detector    [PDF]

ATLAS Collaboration

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'bar -> W+b W-bbar. The search is based on 1.04 fb^-1 of proton-proton
collisions at sqrt(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 is
set at m(t') > 404 GeV.

View original: http://arxiv.org/abs/1202.3076