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The flavor changing top quark decays t -> cV (V=Z,photon,gluon) induced byR-parity-violating couplings in the minimal supersymmetric standard model(MSSM) are evaluated. We find that the decays t -> cV can be significantlyenhanced relative to those in the R-parity conserving SUSY model. Our resultsshow that the top quark FCNC decay can be as large as Br(t->cg)=10^-3,Br(t->cZ)=10^-4 and Br(t-> c\gamma)= 10^-5, which may be observable at theupgraded Tevatron and/or the LHC.Comment: Typos correcte

Flavor-changing top quark decays inR-parity-violating supersymmetric models