Gamma-rays from decaying dark matter

By G. Bertone, W. Buchmüller, L. Covi, A. Ibarra. 2007

149 citations recorded by the source corpus.

We study the prospects for detecting gamma-rays from decaying dark matter (DM), focusing in particular on gravitino DM in R-parity breaking vacua. Given the substantially different angular distribution of the predicted gamma-ray signal with respect to the case of annihilating DM, and the relatively poor (of order 0.1°) angular resolution of gamma-ray detectors, the best strategy for detection is in this case to look for an exotic contribution to the gamma-ray flux at high galactic latitudes, where the decaying DM contribution would resemble an astrophysical extragalactic component, similar to the one inferred by EGRET observations. Upcoming experiments such as GLAST and AMS-02 may identify this exotic contribution and discriminate between it and astrophysical sources, or place significant constraints on the mass and lifetime of DM particles.

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2a969062fee2d34bd1e5d0d7ad8adbc2cf2a2547

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In Atomic and Molecular Physics, and Optics

1. J. Redondo
2. A. Ringwald

In Nuclear and High Energy Physics

1. Alexey Boyarsky
2. Oleg Ruchayskiy
3. Julien Lesgourgues
4. M. Viel
5. M. Shaposhnikov
6. M. Drewes
7. J. Redondo
8. M. Postma

Citations in the corpus

• Massive hidden photons as lukewarm dark matter (2008, background): “Bounds on decaying dark matter have been extensively discussed in the literature [56–62].”
• Constraining light dark matter with diffuse X-ray and gamma-ray observations (2013, unknown): “, [33–44].”
• Lyman-alpha constraints on warm and on warm-plus-cold dark matter models (2008, background): “A search for DM decay signals was conducted both in the keV – MeV range [43, 44, 41, 45, 46, 47] and GeV range [42].”
• The Role of Sterile Neutrinos in Cosmology and Astrophysics (2008, background): “n, if they play a role of warm dark matter).4 In such models mass of sterile neutrino DM can be in the MeV or even GeV range. The radiative decays of such DM particles can be searched with Fermi (cf. [134]), which requires new search strategy due to its large FoV. However, if the DM is multicomponen”