X-ray line signal from decaying axino warm dark matter

Abstract

We consider axino warm dark matter in a supersymmetric axion model with R-parity violation. In this scenario, axino with the mass $m_\axino\simeq 7$ keV can decay into photon and neutrino resulting in the X-ray line signal at $3.5$ keV, which might be the origin of unidentified X-ray emissions from galaxy clusters and Andromeda galaxy detected by the XMM-Newton X-ray observatory.

8 pages, 2 figures, typos corrected, discussion and one more figure added, the final journal version

References in corpus (6)

• Axinos as Dark Matter Particles
• Axino Light Dark Matter and Neutrino Masses with R-parity Violation
• Axino warm dark matter and ${\Omega }_b-{\Omega }_{DM}$ coincidence
• Indirect detection of gravitino dark matter including its three-body decays
• Broken R-Parity in the Sky and at the LHC
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line

Cited by in corpus (29)

• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Physics potential of the International Axion Observatory (IAXO)
• Discovery of a 3.5 keV line in the Galactic Center and a Critical Look at the Origin of the Line Across Astronomical Targets
• A 3.55 keV Photon Line and its Morphology from a 3.55 keV ALP Line
• Generating X-ray lines from annihilating dark matter
• 3.55 keV photon lines from axion to photon conversion in the Milky Way and M31
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• 7 keV Scalar Dark Matter and the Anomalous Galactic X-ray Spectrum
• A Fresh Look at keV Sterile Neutrino Dark Matter from Frozen-In Scalars
• X-ray line in Radiative Neutrino Model with Global $U(1)$ Symmetry
• Nonabelian dark matter models for 3.5 keV X-rays
• Decaying Vector Dark Matter as an Explanation for the 3.5 keV Line from Galaxy Clusters
• SUSY in the sky or a keV signature of sub-GeV gravitino dark matter
• 7 keV Sterile neutrino dark matter in $U(1{)}_R-$ lepton number model
• 3.5-keV X-ray line from nearly-degenerate WIMP dark matter decays
• MeV-GeV $\gamma$-ray telescopes probing axino LSP/gravitino NLSP as dark matter in the $\mu \nu$SSM
• X-ray Line from the Dark Transition Electric Dipole
• Exploring X-Ray Lines as Scotogenic Signals
• Displaced Vertices from X-ray Lines
• Non-abelian Dark Matter Solutions for Galactic Gamma-ray Excess and Perseus 3.5 keV X-ray Line
• 3.5 keV X-ray line and R-Parity Conserving Supersymmetry
• ${\nu }_R$ dark matter-philic Higgs for 3.5 keV X-ray signal
• 3.5 keV Galactic Emission Line as a Signal from the Hidden Sector
• Decaying fermionic warm dark matter and XENON1T electronic recoil excess
• Testing the axion-conversion hypothesis of 3.5 keV emission with polarization
• Supersymmetric Higgs-portal and X-ray lines
• 7 keV sterile neutrino Dark Matter in extended seesaw framework
• WIMP Dark Matter in the U$\mu \nu$SSM
• Is it possible to unify three kinds of Dark Matters into a Kaluza-Klein Neutrino?