Abstract
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 Z boson, two other neutral bosons are considered, a top-Higgs-type scalar and a Z′ boson that appear in Topcolor assisted Technicolor models. We find that the FCNC couplings tqV (q = u, c; V = H, Z, Z′) may produce an interesting signal of same sign top quark pairs that could be observed at the LHC (VLHC).
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