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We examine the prospects for probing heavy top quark-antiquark (t-tbar)resonances at the upgraded LHC in pp collisions at $\root_s = 14 TeV. Heavyt-tbar resonances (Z' bosons) are predicted by several theories that go beyondthe standard model. We consider scenarios in which each top quark decaysleptonically, either to an electron or a muon, and the data sets correspond tointegrated luminosities of \int L dt = 300 /fb and \int L dt = 3000 /fb. Wepresent the expected 5-sigma discovery potential for a Z' resonance as well asthe expected upper limits at 95% C.L. on the Z' production cross section andmass in the absence of a discovery.

Discovery potential for heavy t-tbar resonances in dilepton+jets final states