Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications

Abstract

We study phenomenological implications of an axion that arises as a pseudo Nambu-Goldstone boson due to the spontaneous breaking of anomaly-free global flavor symmetry. One interesting possibility for such anomaly-free axion to explain dark matter (DM) is when it has a mass of order keV and an intermediate scale decay constant, since it can be explored through direct search experiments, X-ray observations, various stellar cooling processes, and the misalignment mechanism naturally explains the DM abundance. As a concrete renormalizable model of such axion, we consider an extended Higgs sector with global flavor symmetry, which consists of three Higgs doublet fields and three singlet Higgs fields with $U(1{)}_{\mathrm{B}-\mathrm{L}}$ charges. We identify viable parameter regions that satisfy theoretical bounds on the Higgs potential and various experimental limits on this model, and evaluate the mass spectra of the axion and extra Higgs bosons. We find that even an anomaly-free axion can generally couple to photons through mixing with CP-odd Higgs, and that its strength depends on the vacuum expectation values of the Higgs doublets as well as the axion mass. As a result, the ratios of the vacuum expectation values of the Higgs doublets are tightly constrained to satisfy the X-ray constraints. We show the favored parameter region where axion DM explains the XENON1T excess. We also demonstrate that the axion-electron coupling is correlated with the extra Higgs boson masses and mixing angles for CP-even Higgs bosons. Thus, if the axion is detected in future observations, the extra Higgs boson masses and the coupling of the standard model-like Higgs boson with the weak gauge bosons are restricted. This is a good example of the synergy between searches for the axion DM and the BSM around the electroweak scale.

58 pages, 14 figures; v3: version published in JHEP; differences from v2: further discussions, figures added, original figures improved, references added

References in corpus (34)

• Revisiting the bound on axion-photon coupling from Globular Clusters
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies
• eROSITA Science Book: Mapping the Structure of the Energetic Universe
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• The oblique parameters in multi-Higgs-doublet models
• Bosonic super-WIMPs as keV-scale dark matter
• A precision constraint on multi-Higgs-doublet models
• A lower bound on the mass of Dark Matter particles
• The nuMSM, leptonic asymmetries, and properties of singlet fermions
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• Revisiting the axion bounds from the Galactic white dwarf luminosity function
• The photo-philic QCD axion
• Constraining DM properties with SPI
• A deep search for decaying dark matter with XMM-Newton blank-sky observations
• The 7 keV axion dark matter and the X-ray line signal
• Fingerprinting non-minimal Higgs sectors
• Discrete symmetries in the three-Higgs-doublet model
• Multi-Higgs doublet models: physical parametrization, sum rules and unitarity bounds
• Anomaly-free flavor models for Nambu-Goldstone bosons and the 3.5 keV X-ray line signal
• New physics in $B$ meson mixing: future sensitivity and limitations
• New mass bound on fermionic dark matter from a combined analysis of classical dSphs
• Searches for sterile neutrinos and axionlike particles from the Galactic halo with eROSITA
• Recognizing symmetries in 3HDM in basis-independent way
• Projected sensitivities of the LUX-ZEPLIN (LZ) experiment to new physics via low-energy electron recoils
• Maximally Symmetric Three Higgs Doublet Model
• Prospects of light charged scalars in a three Higgs doublet model with $Z_3$ symmetry
• Current bounds on the Type-Z $Z_3$ three Higgs doublet model
• Exploring multi-Higgs models with softly broken large discrete symmetry groups
• Higgs boson couplings in multi-doublet models with natural flavour conservation
• Multi-TeV Signals of Baryogenesis in Higgs Troika Model
• Softly-broken $A_4$ or $S_4$ 3HDMs with stable states
• Anomaly-free ALP from non-Abelian flavor symmetry
• CP-Violation in the 3-Higgs Doublet Model: CP-Asymmetries from Charged Higgs Bosons and Electric Dipole Moments

Cited by in corpus (4)

• Axion Dark Matter from Lepton flavor-violating Decays
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• Type-II Majoron Dark Matter
• The Hilbert Series and the Flavor Invariants of the 3HDM