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We study the possibility of same sign top quark pair production at the LHC(and the VLHC) as a direct probe of FCNC processes. Besides the SM neutral Zboson, two other neutral bosons are considered, a top-Higgs type scalar and aZ' boson that appear in Topcolor assisted Technicolor models. We find that theFCNC couplings tqV (q=u,c ; V=H,Z,Z') may produce an interesting signal of samesign top quark pairs that could be observed at the LHC (VLHC).Comment: 6 pages, 8 figures. Some references adde

Flavour changing neutral current production of same sign top quark pairs at the LHC