PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Higgs Physics
Top-Higgs Associated Production involving $A^0$, $H^0$ with Mass at 300 GeV
G.W.S. Hou
Full text: Not available
Abstract
We advocate two Higgs doublet model without $Z_2$ symmetry, and
focus on the extra top Yukawa couplings $\rho_{tt}$ and $\rho_{tc}$.
We show that $A^0$ and $H^0$ bosons are still allowed at 300 GeV mass,
where $cg \to tA^0$, $tH^0$ can lead to $tt\bar c$ same-sign top, or
top-assisted di-Higgs $th^0h^0$ signatures, resp.
As bonus material, we explore the constraint provided by current 4-top
search, but advocate direct search for triple-top generated by
$cg \to tH^0/A^0 \to tt\bar t$ for $H^0,\, A^0$ above $t\bar t$
threshold, and offer some insight on the mild but intriguing
``excess'' found by CMS in $gg \to A^0 \to t\bar t$ at 400 GeV.
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