Rare decay of the top quark t -> cl(l)over-bar and single top quark production at the ILC

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Frank M., Turan İ.

PHYSICAL REVIEW D, vol.74, no.7, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 74 Issue: 7
  • Publication Date: 2006
  • Doi Number: 10.1103/physrevd.74.073014
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: No


We perform a complete and detailed analysis of the flavor changing neutral current rare top quark decays t -> cl(+)l(-) and t -> c nu(i)(nu) over bar (i) at one-loop level in the standard model, two Higgs doublet models (I and II), and in minimal supersymmetric standard model (MSSM). The branching ratios are very small in all models, O(10(-14)), except for the case of the unconstrained MSSM, where they can reach O(10(-6)) for e(+)e(-), mu(+)mu(-), and nu i (nu) over bari, and O(10(-5)) for tau(+)tau(-). This branching ratio is comparable to the ones for t -> cV, cH. We also study the production rates of single top and the forward-backward asymmetry in e(+)e(-)-> t (c) over bar and comment on the observability of such a signal at the International Linear Collider.