Speaker
George Wei-Shu HOU
Description
The Higgs boson $h$ and the top quark $t$ are the two most massive and newest particles ever discovered. If $t\to ch$ occurs at a couple of percent level, the observed $ZZ^*$ and $\gamma\gamma$ signal events for the Higgs boson may have accompanying $cbW$ activity coming from $t\bar t$ feeddown. A general two Higgs doublet model brings in new $ct$, $cc$ and $tt$ couplings that modify properties of the light Higgs $h$, and $t\to ch$ can be searched for via $h \to ZZ^*$, $\gamma\gamma$, $WW^*$ and $b\bar b$ (even $\tau^+\tau^-$) modes in $t\bar t$ events. We show that existing data should be able to push ${\cal B}(t\to ch)$ down to below the percent level.
Primary author
Prof.
George Wei-Shu Hou
(National Taiwan University (TW))
Co-authors
Prof.
Chung Kao
(University of Oklahoma)
Kai-Feng Chen
(National Taiwan University (TW))
Masaya Kohda
(National Taiwan University)
