22-29 July 2015
Europe/Vienna timezone

Flavour-changing top decays in the aligned two-Higgs-doublet model

Jul 24, 2015, 9:00 AM


talk Top and Electroweak Physics Top and Electroweak Physics


gauhar abbas (IFIC, Valencia)


We perform a complete one-loop computation of {the two-body flavour-violating top decays $t \rightarrow c h$ and $t \rightarrow c V$ ($V= \gamma, Z$),} within the aligned two-Higgs-doublet model. We evaluate the impact of the model parameters on the associated branching {ratios,} taking into account constraints from flavour data and measurements of the {Higgs} properties. Assuming that the $125$ GeV Higgs corresponds to the lightest CP-even {scalar} of the CP-conserving aligned two-Higgs-doublet model, we find that the rates for such flavour-violating top decays lie {below} the expected sensitivity of the {future high-luminosity phase of the} LHC. Measurements of the Higgs signal {strength} in the di-photon channel are found to play an important role in limiting the size of the $t \rightarrow c h$ decay rate when the charged scalar of the model is light.

additional information

Accepted in JHEP, arXiv:1503.06423 [hep-ph]

Primary author

gauhar abbas (IFIC, Valencia)

Presentation materials