The existence of high-mass neutral or charged Higgs bosons is predicted in a number of theories beyond the Standard Model. The latest results on searches for such particles with the ATLAS detector will be presented.
We present a simple twist in the well studied two Higgs doublet model in the form of an extra interchange symmetry between the two Higgs doublets ($\Phi_1$ $\leftrightarrow$ $\Phi_2$). There is a residual $Z_2$ symmetry that remains unbroken after the original symmetry $\Phi_1$ $\leftrightarrow$ $\Phi_2$ is spontaneously broken. This unbroken $Z_2$ symmetry makes the charged scalars $H^\pm$,...
We explore 2 Higgs Doublet models with non-standard flavor structures. In analogy to the four,
well studied models with natural flavor conservation (type 1, type 2, lepton-specific, flipped), we
identify four models that preserve an approximate SU (2) 5 flavor symmetry acting on the first two
generations. In all four models, the couplings of the 125 GeV Higgs are modified in...
We study the prospective sensitivity to CP-violating Two Higgs Doublet Models from the 14 TeV
LHC and future electric dipole moment (EDM) experiments. We concentrate on the search for a
resonant heavy Higgs that decays to a Z boson and a SM-like Higgs h, leading to the Z(ll)h(bb̄)
final state. The prospective LHC reach is analyzed using the Boosted Decision Tree method. We
illustrate the...
We show that within the two Higgs doublet model (T2HDM), where both Higgs doublet couple to fermions in same hierarchical pattern, there can be significant deviations in the Higgs-fermion couplings with respect to their respective standard model values, consistent with flavor constraints and known properties of the Higgs boson. The model is very predictive, implying unavoidable new physics...
After Higgs discovery, the detail structure of Higgs sector remains to be determined. A well motivated extension of the Standard Model Higgs sector is Two Higgs Doublet Model (2HDM), which predicts a pair of charged Higgs boson $H^{\pm}$, a CP-odd Higgs $A$ and another CP-even Higgs $H$. The conventional searches focus on Higgs decays into a pair of SM fermions or gauge bosons. However,...
An enhanced production of double Higgs bosons or exotic decays of the Higgs boson would be two clear signs of beyond Standard Model physics. A [search][1] is performed for resonant and non-resonant Higgs boson pair production, where the two Higgs bosons decay to four bottom quarks. Another [search][2] is conducted for a Higgs boson decay to XX to four leptons. Both analyses use up to 36...
We adopt a general two Higgs doublet model (2HDM) to study the signature
of flavor changing neutral Higgs (FCNH) decays into leptons at the CERN
Large Hadron Collider (LHC) as well as future hadron colliders.
$pp \to \phi^0 \to \tau^\mp\mu^\pm +X$, where $\phi^0$ could be a CP-even scalar [$h^0$ (lighter), $H^0$ (heavier)] or a CP-odd pseudoscalar ($A^0$).The LHC measurements of the light...
