New Supersymmetric Contributions to $t->cV$

Details New Supersymmetric Contributions to $t->cV$ New Supersymmetric Contributions to $t->cV$

1997-02-16

arxiv.org/abs/hep-ph/9702350v2

Phys.Rev. D56 (1997) 3100-3106

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTex, 1 figure included. Final version to appear in Physical Review D. Chargino contribution dealt with in greater

Scientific paper

10.1103/PhysRevD.56.3100

We calculate the electroweak-like one-loop supersymmetric contributions to the rare and flavor-violating decay of the top quark into a charm quark and a gauge boson: $t->c V$, with $V=\gamma,Z,g$. We consider loops of both charginos and down-like squarks (where we identify and correct an error in the literature) and neutralinos and up-like squarks (which have not been calculated before). We also account for left-right and generational squark mixing. Our numerical results indicate that supersymmetric contributions to $t->cV$ can be upto 5 orders of magnitude larger than their Standard Model counterparts. However, they still fall short of the sensitivity expected at the next-generation top-quark factories.

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