Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model

Abstract

In this article we study the possibility that neutral and charged scalars lighter than the 125 GeV Higgs boson might exist within the framework of the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model. Depending on which new scalar (scalars) is (are) light, seven different scenarios may be considered. Using the open-source code HEPfit, which relies on Bayesian statistics, we perform global fits for all seven light-mass scenarios. The constraints arising from vacuum stability, perturbativity, electroweak precision observables, flavour observables, Higgs signal strengths, and direct-detection results at the LEP and the LHC are taken into account. Reinterpreted data from slepton searches are considered too. It turns out that the seven scenarios contain sizeable regions of their parameter space compatible with all current data. Although not included in the global fits, the possible implications of $(g-2{)}_{\mu }$ are also addressed.

53 pages, 8 figures, 17 tables

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U
• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• New Barr-Zee contributions to $(\mathbf{g}-2{)}_{\mu }$ in two-Higgs-doublet models
• A light pseudoscalar of 2HDM confronted with muon g-2 and experimental constraints
• Search for a 'stable alignment limit' in two Higgs-doublet models
• Next-to-leading order unitarity fits in Two-Higgs-Doublet models with soft ${\mathbb{Z}}_2$ breaking
• Slepton Production at e+e- and e-e- Linear Colliders
• $B_{s,d}^0\to {\ell }^{+}{\ell }^{-}$ Decays in the Aligned Two-Higgs-Doublet Model
• Flavour alignment in multi-Higgs-doublet models
• New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models
• Flavour constraints on multi-Higgs-doublet models: Yukawa alignment
• An ultra-weak sector, the strong CP problem and the pseudo-Goldstone dilaton
• Low-mass fermiophobic charged Higgs phenomenology in two-Higgs-doublet models
• Effective Aligned 2HDM with a DFSZ-like invisible axion
• Coup de grace to the charged Higgs solution of $P_5^{\prime }$ and $R_{D^{(\ast )}}$ discrepancies
• Constraints on coloured scalars from global fits

Cited by in corpus (1)

• Exploring Potential Higgs Resonances at 650 GeV and 95 GeV in the 2HDM Type III