Galactic Centre GeV Photons from Dark Technicolor

Abstract

We present a classically scale-invariant model with a confining dark sector, which is coupled to the Standard Model through the Higgs portal. The galactic centre gamma ray excess can be explained in this model by collision-induced dark matter decays to b-quarks. We discuss the possibility to obtain the dark matter relic density through thermal freeze-out, which however requires excessive fine-tuning. We then instead focus on a freeze-in scenario and perform detailed calculations and a parameter scan. We find that the observed relic density and the gamma ray excess can be explained by a wide range of parameters in this model.

arXiv comment7 pages, 5 figures. The final version to be published in JHEP

References in corpus (38)

• Search for the Standard Model Higgs Boson at LEP
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• The SIMP Miracle
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy
• On The Origin Of The Gamma Rays From The Galactic Center
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• The Four Basic Ways of Creating Dark Matter Through a Portal
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• A comment on the emission from the Galactic Center as seen by the Fermi telescope
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Physical Naturalness and Dynamical Breaking of Classical Scale Invariance
• Decay-mode independent searches for new scalar bosons with the OPAL detector at LEP
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Electroweak and Conformal Symmetry Breaking by a Strongly Coupled Hidden Sector
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• Unified interpretation of cosmic-ray nuclei and antiproton recent measurements
• The windows for kinetically mixed Z'-mediated dark matter and the galactic center gamma ray excess
• The Effective Hooperon
• Antiprotons from dark matter annihilation in the Galaxy: astrophysical uncertainties
• On the connection of Gamma-rays, Dark Matter and Higgs searches at LHC
• A weighty interpretation of the Galactic Centre excess
• Dark Forces and Light Dark Matter
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Poincare Protection for a Natural Electroweak Scale
• Electroweak symmetry breaking and cold dark matter from strongly interacting hidden sector
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• What Does The PAMELA Antiproton Spectrum Tell Us About Dark Matter?
• A Possible Explanation of Low Energy $\gamma$-ray Excess from Galactic Centre and Fermi Bubble by a Dark Matter Model with Two Real Scalars
• Thermal Dark Matter from a Confining Sector
• Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center
• Cosmic ray propagation and dark matter in light of the latest AMS-02 data
• Fermi Bubbles under Dark Matter Scrutiny. Part I: Astrophysical Analysis
• Galactic Center Gamma-Ray Excess through a Dark Shower
• Twin Peak Higgs

Cited by in corpus (39)

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Gravitational Waves From a Dark (Twin) Phase Transition
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• WIMPs at the Galactic Center
• Phase transition and vacuum stability in the classically conformal B-L model
• Accidental Dark Matter: Case in the Scale Invariant Local $B-L$ Models
• Stealth Dark Matter: Dark scalar baryons through the Higgs portal
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Signals of a Light Dark Force in the Galactic Center
• Model-independent analysis of the DAMPE excess
• Upgrading Sterile Neutrino Dark Matter to FI$m$P Using Scale Invariance
• Evolving Planck Mass in Classically Scale-Invariant Theories
• Multimediator models for the galactic center gamma ray excess
• The $\text{Fermi}$-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
• Nambu-Goldstone Dark Matter in a Scale Invariant Bright Hidden Sector
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• Scale genesis and gravitational wave in a classically scale invariant extension of the standard model
• Genesis of electroweak and dark matter scales from a bilinear scalar condensate
• Hidden strongly interacting massive particles
• Observational Constraints on Decoupled Hidden Sectors
• Prospects for indirect detection of frozen-in dark matter
• Bosonic seesaw mechanism in a classically conformal extension of the Standard Model
• Dark chiral symmetry breaking and the origin of the electroweak scale
• Confronting Galactic center and dwarf spheroidal gamma-ray observations with cascade annihilation models
• Classification of dark pion multiplets as dark matter candidates and collider phenomenology
• Dark matter freeze-in from semi-production
• Scale and electroweak first-order phase transitions
• Dark Higgs Channel for FERMI GeV $\gamma$-ray Excess
• Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess
• Interpreting the galactic center gamma-ray excess in the NMSSM
• The Galactic Center Excess from Z3 Scalar Semi-Annihilations
• Interpreting the Fermi-LAT gamma ray excess in the simplified framework
• Non-perturbative electroweak-scalegenesis on the test bench of dark matter detection
• Scale and confinement phase transitions in scale invariant $SU(N)$ scalar gauge theory
• Direct signals from electroweak singlets through the Higgs portal
• A mechanism to generate varying speed of light via Higgs-dilaton coupling: Theory and cosmological applications
• Cosmological Dark Matter in a Conformal Model
• Dark matter properties implied by gamma ray interstellar emission models
• Event-level variables for semivisible jets using anomalous jet tagging