Abstract
In this article, we demonstrate that the unexpected peak at around 95 GeV as seen recently by CMS in the di-photon final state can be explained within the type-I two-Higgs-doublet model by means of a moderately-to-strongly fermiophobic CP-even Higgs H. Depending on the Higgs mass spectrum, the production of such a H arises dominantly from vector boson fusion or through a cascade in either ppto toverline{t} with overset{left(-right)}{t}to {H}^{pm}overset{left(-right)}{b}to {W}^{pm *}Hoverset{left(-right)}{b} or pp → A with A → W∓H± → W∓W±H or via pp → W± ∗ → H±H. In this context, we also discuss other Higgs anomalies such as the LEP excess in Higgsstrahlung and the observation of enhanced rates in toverline{t}h at both the Tevatron and the LHC, showing that parameters capable of explaining the CMS di-photon signal can address the latter deviations as well. The Higgs spectra that we explore comprise masses between 80 GeV and 350 GeV. While at present all constraints from direct and indirect searches for spin-0 resonances can be shown to be satisfied for such light Higgses, future LHC data will be able to probe the parameter space that leads to a simultaneous explanation of the discussed anomalies.
Highlights
We find that depending on the choice of mixing angles α and β as well as the masses MA and MH+, the production of such a H proceeds dominantly either via the vector boson fusion (VBF)
The parameters (3.1) lead to κhγ = 0.78, and we find that charged Higgs loops suppress Γ (h → γγ) by around 15% with respect to the case when only top and W -boson loops are considered
3.2 Star benchmark scenario The second type-I 2HDM benchmark scenario that we study in detail is defined by sin α = 0.15, tan β = 5.5, MA = 205 GeV, MH+ = 125 GeV, λ3 = 0.55
Summary
The 2HDM scalar potential that we will consider throughout this work is given by the following expression (see for example [16, 17] for a review). To avoid possible issues with electric dipole moments, we assume in what follows that μ3 and λ5 have no imaginary parts This automatically ensures that the potential is CP conserving, i.e. the mass eigenstates have definite CP properties. Diagonalising the mass-squared matrices of the scalars leads to relations between the fundamental parameters of VH and the physical masses and mixing angles. This allows one to trade the parameters μ1, μ2, μ3, λ1, λ2, λ4, λ5 for α, β, Mh, MH , MA, MH+ and v. The only remaining free parameter of the original Higgs potential entering our calculations is λ3.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
