17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Top Decays with Flavor Changing Neutral Higgs Interactions at the LHC

19 Jul 2013, 16:00
F2 (KTH Campus)


KTH Campus

Talk presentation Top and Electroweak Physics Top and Electroweak Physics


Chung Kao


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)

Presentation Materials