Speaker
Chung Kao
Description
We investigate the prospects for discovering a top quark decaying into
one light Higgs boson along with a charm quark in top quark pair production at the CERN Large Hadron Collider (LHC).
A general two Higgs doublet model is adopted to study the signature of flavor changing neutral Higgs decay $t \to c\phi^0$, or
$\bar{t} \to \bar{\phi^0$ where $\phi^0$ could be CP-even ($H^0$)
or CP-odd ($A^0$).
The dominant physics background is evaluated with realistic
acceptance cuts as well as tagging and mistagging efficiencies.
For a reasonably large top-charm-Higgs coupling
($\lambda_{tc}/\lambda_{t} \agt 0.09$), the abundance of signal events and the reduction in physics background allow us to establish a $5\sigma$ signal for $M_\phi \sim 125$ GeV at the LHC with a center of mass energy ($\sqrt{s}$) of 8 TeV and an integrated luminosity of $20$~fb$^{-1}$. The discovery potential will be greatly enhanced with the full energy of $\sqrt{s} = 14$ TeV.
Primary author
Prof.
Chung Kao
(University of Oklahoma)
