Cosmic rays through the Higgs portal

Abstract

We consider electroweak singlet dark matter with a mass comparable to the Higgs mass. The singlet is assumed to couple to standard matter through a perturbative coupling to the Higgs particle. The annihilation of a singlet with a mass comparable to the Higgs mass is dominated by proximity to the W, Z and Higgs peaks in the annihilation cross section. We find that the continuous photon spectrum from annihilation of a perturbatively coupled singlet in the galactic halo can reach a level of several per mil of the EGRET diffuse gamma ray flux.

21 pages, 13 figures

References in corpus (54)

• The Structure of Cold Dark Matter Halos
• Particle Dark Matter: Evidence, Candidates and Constraints
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Towards the Theory of Reheating After Inflation
• Reheating after Inflation
• Simulations of X-ray Clusters
• Minimal Dark Matter
• Gauge Singlet Scalars as Cold Dark Matter
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• EGRET Observations of the Extragalactic Gamma Ray Emission
• LCDM-based models for the Milky Way and M31 I: Dynamical Models
• Cosmology and Astrophysics of Minimal Dark Matter
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• Diffuse Galactic continuum gamma rays. A model compatible with EGRET data and cosmic-ray measurements
• Superheavy dark matter
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Conformal Symmetry and the Standard Model
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• Cosmological dark matter annihilations into gamma-rays - a closer look
• The New Minimal Standard Model
• Higgs-field Portal into Hidden Sectors
• Nonthermal Supermassive Dark Matter
• Heavy Dark Matter Through the Higgs Portal
• Novel Effects in Electroweak Breaking from a Hidden Sector
• A "Baedecker" for the Dark Matter Annihilation Signal
• Where to find a dark matter sterile neutrino?
• Minimal Dark Matter predictions for galactic positrons, anti-protons, photons
• Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• Matter Creation via Vacuum Fluctuations in the Early Universe and Observed Ultra-High Energy Cosmic Ray Events
• Shadow Higgs from a scale-invariant hidden $U(1{)}_s$ model
• Upper Bound on the Dark Matter Total Annihilation Cross Section
• Annihilating Cold Dark Matter
• Supersymmetric Dark Matter - How Light Can the LSP Be?
• Lower Bound on the Neutralino Mass from New Data on CMB and Implications for Relic Neutralinos
• Unitarity Bounds and the Cuspy Halo Problem
• Ultra High Energy Cosmic Rays and Inflation Relics
• Discovering an Invisibly Decaying Higgs at Hadron Colliders
• Dark matter pair-production in b -> s transitions
• A Very Narrow Shadow Extra Z-boson at Colliders
• Ultra-high energy cosmic rays from annihilation of superheavy dark matter
• The Likely Cause of the EGRET GeV Anomaly and its Implications
• Collisional Dark Matter and Scalar Phantoms
• Next to Minimal Higgs : Mass Bounds and Search Prospects
• Dilatonic Dark Matter and Unified Cosmology -- a New Paradigm --
• Physics Beyond the Standard Model and Dark Matter
• Dilaton as a Dark Matter Candidate and its Detection
• Implications of a dilaton in gauge theory and cosmology
• Z_2-Singlino Dark Matter in a Portal-Like Extension of the Minimal Supersymmetric Standard Model
• Dilatonic Dark Matter
• Phenomenology from a U(1) gauged hidden sector
• Variation of the fine structure constant in QSO spectra from coherent dark matter oscillations
• Search for Low Mass SM Higgs at the Tevatron

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• Gamma rays from the annihilation of singlet scalar dark matter
• Higgs decays to dark matter: beyond the minimal model
• Antimatter signals of singlet scalar dark matter
• Viable dark matter via radiative symmetry breaking in a scalar singlet Higgs portal extension of the standard model
• Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models
• The little hierarchy problem for new physics just beyond the LHC
• Large contributions to dark matter annihilation from three-body final states
• Doubly Coexisting Dark Matter Candidates in an Extended Seesaw Model
• A simple inert model solves the little hierarchy problem and provides a dark matter candidate
• keV Warm Dark Matter via the Supersymmetric Higgs Portal
• Direct signals from electroweak singlets through the Higgs portal
• Double Higgs mechanisms, supermassive stable particles and the vacuum energy