Dark Matter with Topological Defects in the Inert Doublet Model

Abstract

We examine the production of dark matter by decaying topological defects in the high mass region $m_{\mathrm{DM}}\gg m_W$ of the Inert Doublet Model, extended with an extra U(1) gauge symmetry. The density of dark matter states (the neutral Higgs states of the inert doublet) is determined by the interplay of the freeze-out mechanism and the additional production of dark matter states from the decays of topological defects, in this case cosmic strings. These decays increase the predicted relic abundance compared to the standard freeze-out only case, and as a consequence the viable parameter space of the Inert Doublet Model can be widened substantially. In particular, for a given dark matter annihilation rate lower dark matter masses become viable. We investigate the allowed mass range taking into account constraints on the energy injection rate from the diffuse $\gamma$-ray background and Big Bang Nucleosynthesis, together with constraints on the dark matter properties coming from direct and indirect detection limits. For the Inert Doublet Model high-mass region, an inert Higgs mass as low as $\sim 200$ GeV is permitted. There is also an upper limit on string mass per unit length, and hence the symmetry breaking scale, from the relic abundance in this scenario. Depending on assumptions made about the string decays, the limits are in the range $10^{12}$ GeV to $10^{13}$ GeV.

27 pages, 3 figures. V2: Published version with references added

References in corpus (21)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• Cosmology and Astrophysics of Minimal Dark Matter
• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• Inert Doublet Model and LEP II Limits
• Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in sqrt(s) = 8TeV pp collisions with the ATLAS detector
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Natural Dark Matter from an Unnatural Higgs Boson and New Colored Particles at the TeV Scale
• Benchmarks for Dark Matter Searches at the LHC
• A new viable region of the inert doublet model
• Searches for topological defect dark matter via non-gravitational signatures
• Cosmic Strings in Hidden Sectors: 1. Radiation of Standard Model Particles
• Dark Strings and their Couplings to the Standard Model
• Big-Bang Nucleosynthesis and Gamma-Ray Constraints on Cosmic Strings with a large Higgs condensate
• Dark Matter and Dark Force in the Type-I Inert 2HDM with Local U(1)_H Gauge Symmetry
• Dark Strings
• Cosmic Strings in Hidden Sectors: 2. Cosmological and Astrophysical Signatures
• Dark Matter from Decaying Topological Defects
• Two Higgs doublet models with local U(1)_H gauge symmetry and dark matter

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• Electroweak strings with dark scalar condensates and their (in)stability