Dwarf Galaxy $\gamma$-excess and 3.55 keV X-ray Line In A Nonthermal Dark Matter Model

Abstract

Recent data from Reticulum II (RetII) require the energy range of the FermiLAT $\gamma$-excess to be $\sim$ $2-10$ GeV. We adjust our unified nonthermal Dark Matter (DM) model to accommodate this. We have two extra scalars beyond the Standard Model to also explain 3.55 keV X-ray line. Now the mass of the heavier of them has to be increased to lie around 250 GeV, while that of the lighter one remains at 7.1 keV. This requires a new seed mechanism for the $\gamma$-excess and new Boltzmann equations for the generation of the DM relic density. All concerned data for RetII and the X-ray line can now be fitted well and consistency with other indirect limits attained.

8 eps figures, 1 Table, 7 pages. The paper has been completely rewritten with additional references and discussions of indirect constraints from AMS-02 and ANTARES data. Basic results remain unchanged. Version accepted for publication in Europhysics Letters

References in corpus (39)

• Dark Matter Results from 225 Live Days of XENON100 Data
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Dark Nuclei I: Cosmology and Indirect Detection
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• WIMPs at the Galactic Center
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• Not so Coy Dark Matter explains DAMA (and the Galactic Center excess)
• The Effective Hooperon
• A weighty interpretation of the Galactic Centre excess
• The Galactic Center Excess from the Bottom Up
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess
• A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
• Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Search of Dark Matter Annihilation in the Galactic Centre using the ANTARES Neutrino Telescope
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center
• 7 keV Scalar Dark Matter and the Anomalous Galactic X-ray Spectrum
• Fits to the Fermi-LAT GeV excess with RH sneutrino dark matter: implications for direct and indirect dark matter searches and the LHC
• Multimediator models for the galactic center gamma ray excess
• Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
• 3.55 keV X-ray Line Signal from Excited Dark Matter in Radiative Neutrino Model
• The interpretation for Galactic Center Excess and Electroweak Phase Transition in the NMSSM
• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• The 3.5 keV X-ray line signature from annihilating and decaying dark matter in Weinberg model
• The X-Ray Line Feature At 3.5 Kev In Galaxy Cluster Spectra
• Common Origin of 3.55 keV X-Ray Line and Galactic Center Gamma Ray Excess in a Radiative Neutrino Mass Model
• Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter
• Dark Higgs Channel for FERMI GeV $\gamma$-ray Excess
• Interpreting the galactic center gamma-ray excess in the NMSSM
• Low Energy Gamma Ray Excess Confronting a Singlet Scalar Extended Inert Doublet Dark Matter Model

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