Majorana dark matter through the Higgs portal under the vacuum stability lamppost

Abstract

We study the vacuum stability of a minimal Higgs portal model in which the standard model (SM) particle spectrum is extended to include one complex scalar field and one Dirac fermion. These new fields are singlets under the SM gauge group and are charged under a global U(1) symmetry. Breaking of this U(1) symmetry results in a massless Goldstone boson, a massive CP-even scalar, and splits the Dirac fermion into two new mass-eigenstates, corresponding to Majorana fermions. The lightest Majorana fermion (w) is absolutely stable, providing a plausible dark matter (DM) candidate. We show that interactions between the Higgs sector and the lightest Majorana fermion which are strong enough to yield a thermal relic abundance consistent with observation can easily destabilize the electroweak vacuum or drive the theory into a non-perturbative regime at an energy scale well below the Planck mass. However, we also demonstrate that there is a region of the parameter space which develops a stable vacuum (up to the Planck scale), satisfies the relic abundance, and is in agreement with direct DM searches. Such an interesting region of the parameter space corresponds to DM masses 350 GeV \alt m_w \alt 1 TeV. The region of interest is within reach of second generation DM direct detection experiments.

To be published in PRD

References in corpus (24)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Search for Low-Mass WIMPs with SuperCDMS
• Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Complex Singlet Extension of the Standard Model
• Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• The Probable Fate of the Standard Model
• A second Higgs from the Higgs portal
• Deducing the nature of dark matter from direct and indirect detection experiments in the absence of collider signatures of new physics
• The lifetime of the electroweak vacuum and sensitivity to Planck scale physics
• Axion cosmology with long-lived domain walls
• BBN And The CMB Constrain Neutrino Coupled Light WIMPs
• Standard Model anatomy of WIMP dark matter direct detection II: QCD analysis and hadronic matrix elements
• Gravitational corrections to Standard Model vacuum decay
• Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)
• Total Width of 125 GeV Higgs Boson
• Light Dark Matter, Naturalness, and the Radiative Origin of the Electroweak Scale
• Search for the Rare Decay B->K nu nubar
• Vacuum Stability in U(1)-Prime Extensions of the Standard Model with TeV Scale Right Handed Neutrinos
• WIMP Dark Matter Direct-Detection Searches in Noble Gases
• An Ultimate Target for Dark Matter Searches

Cited by in corpus (7)

• The Waning of the WIMP? A Review of Models, Searches, and Constraints
• Constraints on Abelian Extensions of the Standard Model from Two-Loop Vacuum Stability and $U(1{)}_{B-L}$
• Protecting the Stability of the EW Vacuum from Planck-Scale Gravitational Effects
• Impact of New Physics on the EW vacuum stability in a curved spacetime background
• The Dark Sequential Z' Portal: Collider and Direct Detection Experiments
• When Freeze-out occurs due to a non-Boltzmann suppression: A study of degenerate dark sector
• Aligning a Majorana fermion's anapole moment with an external current through photon emission mediated by the fermion's generalized polarizabilities