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

Abstract

We compute the contributions to rare top decays $t\to cZ$ and $t\to c{h}_1$ 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 $BR(t\to cZ)$ and $BR(t\to c{h}_1)$ are obtained as a function of the model parameters. In particular, the $BR(t\to cZ)$ 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 $BR(t\to c{h}_1)$ can reach values of the order of $\sim 10^{-2}$. 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 $b\to s\gamma$ process.

19 pages, 12 figures

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Cited by in corpus (11)

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• Neutrino Masses in a Two Higgs Doublet Model with a U(1) Gauge Symmetry
• $t\to cg$ and $t\to cZ$ in Universal Extra Dimensional Models
• Search for the $t\to ch$ decay at hadron colliders
• Scotogenic top-quark FCNC decays
• Top Rare Decays t-> cV in the Mirror Twin Higgs Models
• Top-quark flavor-changing $tqZ$ couplings and rare $\Delta F=1$ processes
• Flavor signatures of complex anomalous $tcZ$ couplings
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Flavor-changing decay $h\to \tau \mu$ at super hadron colliders
• Lepton flavor violating top quark FCNC processes at the $\mu$TRISTAN