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In the littlest Higgs Model with T-parity, we discuss the pair production ofthe T-odd top partner ($T_{-}$) which decays almost 100\% into the top quarkand the lightest T-odd particle ($A_{H}$). Considering the current constraints,we investigate the observability of the T-odd top partner pair productionthrough the process $pp\rightarrow T_{-}\bar{T}_{-}\rightarrowt\bar{t}A_{H}A_{H}$ in final states with two leptons at 14 TeV LHC. We analyzethe signal significance and find that the lower limit on the T-odd top partnermass are about 1.04 TeV, 1.14 TeV, 1.23 TeV at $2\sigma$ confidence level at14TeV LHC with the integrated luminosity of 30 fb$^{-1}$, 100fb$^{-1}$,300fb$^{-1}$. This lower limit can be raised to about 1.34(1.44) TeV if we use1000(3000) fb$^{-1}$ of integrated luminosity.

T-odd top partner pair production in the dilepton final states at the LHC in the littlest Higgs Model with T-parity