Testing models with non-minimal Higgs sector through the decay t->q+WZ
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.
Cite
@article{arxiv.hep-ph/9911407,
title = {Testing models with non-minimal Higgs sector through the decay t->q+WZ},
author = {J. L. Diaz Cruz and D. A. Lopez Falcon},
journal= {arXiv preprint arXiv:hep-ph/9911407},
year = {2009}
}
Comments
Typeset using REVTEX and EPSF, 5 pag, 2 figures