Production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mi>Z</mml:mi><mml:mi>H</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mi>Z</mml:mi><mml:mi>h</mml:mi></mml:math> in 2HDM: Prospects for discovery at the LHC
W.-S. Hou, Tanmoy Modak
Abstract
We study the discovery potential of the $cg\ensuremath{\rightarrow}tA\ensuremath{\rightarrow}tZH$ process at the LHC, where $A$ and $H$ are $CP$-odd and -even exotic scalars, respectively. The context is the general two Higgs doublet model, where $cg\ensuremath{\rightarrow}tA$ is induced by the flavor changing neutral Higgs coupling ${\ensuremath{\rho}}_{tc}$. We find that the process $cg\ensuremath{\rightarrow}tA\ensuremath{\rightarrow}tZH$ can be discovered for ${m}_{A}\ensuremath{\sim}400\text{ }\text{ }\mathrm{GeV}$, but would likely require high luminosity running of the LHC. Such a discovery would shed light on the mechanism behind the observed baryon asymmetry of the Universe. We also study $cg\ensuremath{\rightarrow}tA\ensuremath{\rightarrow}tZh$, where $h$ is the observed 125 GeV scalar, but find it out of reach at the LHC.