SUSY in the sky or a keV signature of sub-GeV gravitino dark matter

Abstract

We point out that recently discovered 3.5 keV line in X-ray spectra from various galaxy clusters and the Andromeda galaxy can be naturally explained by physics of a sector responsible for spontaneous supersymmetry breaking in models with R-parity. In this scenario the source of this line could be decay of sgoldstino - scalar superpartner of massive gravitino. At the same time the dominant dark matter component is stable gravitino whose mass is predicted to be about 0.25 GeV.

8 pages, published version

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Cited by in corpus (16)

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• 3.55 keV photon lines from axion to photon conversion in the Milky Way and M31
• 7 keV Scalar Dark Matter and the Anomalous Galactic X-ray Spectrum
• Dark photon relic dark matter production through the dark axion portal
• X-ray line in Radiative Neutrino Model with Global $U(1)$ Symmetry
• A Dynamical Framework for KeV Dirac Neutrino Warm Dark Matter
• Decaying Vector Dark Matter as an Explanation for the 3.5 keV Line from Galaxy Clusters
• 3.5-keV X-ray line from nearly-degenerate WIMP dark matter decays
• X-ray Line from the Dark Transition Electric Dipole
• Displaced Vertices from X-ray Lines
• 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
• Polarization of photons emitted by decaying dark matter
• Supersymmetric Higgs-portal and X-ray lines
• 7 keV sterile neutrino Dark Matter in extended seesaw framework