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SM Higgs boson and $t\rightarrow cZ$ decays in the 2HDM type III with CP violation

Authors :
Gaitán, Ricardo
Martinez, Roberto
de Oca, Jose Halim Montes
Garcés, Estela A.
Source :
Phys. Rev. D 98, 035031 (2018)
Publication Year :
2017

Abstract

We compute the contributions to rare top decays $t\rightarrow cZ$ and $t\rightarrow ch_1$ from the scalar sector in the 2HDM type III with CP violation, where $h_1$ is the Standard Model Higgs boson. The branching ratio for $BR(t\rightarrow c Z)$ and $BR(t\rightarrow c h_1)$ are obtained as a function of the model parameters. In particular, the $BR(t\rightarrow c Z)$ can increase its value up to $10^{-3}$ for $\tan\beta= 1$ and masses for the additional Higgs bosons of $m_{h_2,h_3,H^\pm}\sim 0.5$ TeV. Meanwhile $BR(t\rightarrow c h_1)$ can reach values of the order of $\sim10^{-2}$. We constrain the model parameters (mixing angles of the neutral scalar fields in the CP violation context and $\tan\beta$) using the reported values of the signal strengths $R_{XX}$ and $b \rightarrow s \gamma$ process.<br />Comment: 19 pages, 12 figures

Details

Database :
arXiv
Journal :
Phys. Rev. D 98, 035031 (2018)
Publication Type :
Report
Accession number :
edsarx.1710.04262
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.98.035031