Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider

Details Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider

2006-09-06

arxiv.org/abs/hep-ph/0609069v2

Phys.Rev.D74:073014,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages and 18 figures, minor clarification in the text, references added. To be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.74.073014

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 bar nu_i at one-loop level in the Standard Model, Two Higgs Doublet Models (I and II) and in 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- and nu_i bar nu_i, and O(10^-5) for tau+ tau-. This branching ratio is comparable to the ones for t-> c V, cH. We also study the production rates of single top and the forward-backward asymmetry in e+e- -> t cbar and comment on the observability of such a signal at the International Linear Collider.

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