Speaker
Prof.
Chung Kao
(University of Oklahoma)
Description
We investigate prospects for discovery of a heavy Higgs boson
$\phi^0$ ($m_\phi > m_t$) that decays into a top and a charm
quark at the CERN Large Hadron Collider (LHC),
where $\phi^0$ could be a CP-even scalar ($H^0$) or
a CP-odd pseudoscalar ($A^0$).
A general two Higgs doublet model (2HDM) is adopted to study the signature
of flavor changing neutral Higgs (FCNH) decay $\phi^0 \to t\bar{c}+\bar{t}c$.
Discovery of this signal will greatly improve our understanding of
electroweak symmetry breaking and possible sources of tree level
flavor changing neutral currents.
Almost all LHC coupling measurements of the 126 GeV Higgs boson favor
the decoupling limit or the alignment limit of a 2HDM, in which the gauge
boson and diagonal fermion couplings of the light neutral Higgs scalar
($h^0$) approach the Standard Model values.
In this limit, FCNH couplings of $h^0$
are naturally suppressed by a small mixing parameter $\cos(\beta-\alpha)$,
while the off-diagonal couplings of heavier neutral Higgs scalars
are sustained by $\sin(\beta-\alpha) \sim 1$.
We study dominant processes with physics background, applying
realistic acceptance cuts and tagging efficiencies.
Promising results are found for the LHC running at
13 or 14 TeV collision energies.
Author
Prof.
Chung Kao
(University of Oklahoma)
Co-authors
Dr
Baris Altunkaynak
(University of Oklahoma)
Mr
Brent McCoy
(University of Oklahoma)
Prof.
George Wei-Shu Hou
(National Taiwan University)
Dr
Masaya Kohda
(Chung-Yuan Christian University)
