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Testing models with non-minimal Higgs sector through the decay t->q+WZ

J. L. Diaz Cruz·D. A. Lopez Falcon
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Abstract

We study the contribution of charged Higgs boson to the rare decay of the top quark t->q+WZ (q=d,s,b) in models with Higgs sector that includes doublets and triplets. Higgs doublets are needed to couple charged Higgs with quarks, whereas the Higgs triplets are required to generate the non-standard vertex HWZ at tree-level. It is found that within a model that respect the custodial SU(2) symmetry and avoids flavour changing neutral currents by imposing discrete symmetries, the decay mode t->b+WZ, can reach a branching ratio of order 0.0178, whereas the decay modes t->(d,s)+WZ, can reach a similar branching ratio in models where flavour changing neutral currents are suppressed by flavour symmetries.

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J. L. Diaz Cruz, D. A. Lopez Falcon. 2000-02-18. Testing models with non-minimal Higgs sector through the decay t->q+WZ. https://doi.org/10.1103/physrevd.61.051701

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