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We study the Littlest Higgs model with T-parity at the LHC through pairproductions of the T-odd top quark partner (T_-) which decays into the topquark and the lightest T-odd particle. We identify the region of parametersfavored by the electroweak and cosmological considerations. The signal andbackground events are simulated with fast detector simulation to study thediscovery potential at the LHC. We find that the hemisphere analysis recentlyproposed by the CMS collaboration is very useful to separate the signal fromthe t\bar{t} background. We discuss the observability of the top tagged signalin the effective mass (M_{eff}) versus the transverse missing energy(E_{Tmiss}) plane. We show that, for all our sample parameter sets with M_{T_-}\leq 900 GeV, the excess of the signal over the background can be visible as abump structure in the E_{Tmiss} distribution for 50 fb^{-1} at relatively highM_{eff} intervals.Comment: 27 pages, 11 figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Hunting for the top partner in the littlest Higgs model with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>parity at the CERN LHC

Hunting for the top partner in the littlest Higgs model withTparity at the CERN LHC