Constraining light dark matter with diffuse X-ray and gamma-ray observations

By R. Essig, E. Kuflik, Samuel D. McDermott, T. Volansky, K. Zurek. 2013

262 citations recorded by the source corpus.

A bstractWe present constraints on decaying and annihilating dark matter (DM) in the 4 keV to 10 GeV mass range, using published results from the satellites HEAO-1, INTEGRAL, COMPTEL, EGRET, and the Fermi Gamma-ray Space Telescope. We derive analytic expressions for the gamma-ray spectra from various DM decay modes, and find lifetime constraints in the range 1024 − 1028 sec, depending on the DM mass and decay mode. We map these constraints onto the parameter space for a variety of models, including a hidden photino that is part of a kinetically mixed hidden sector, a gravitino with R-parity violating decays, a sterile neutrino, DM with a dipole moment, and a dark pion. The indirect constraints on sterile-neutrino and hidden-photino DM are found to be more powerful than other experimental or astrophysical probes in some parts of parameter space. While our focus is on decaying DM, we also present constraints on DM annihilation to electron-positron pairs. We find that if the annihilation is p-wave suppressed, the galactic diffuse constraints are, depending on the DM mass and velocity at recombination, more powerful than the constraints from the Cosmic Microwave Background.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/74899872f0c43e382cb2b0c2fe3099b2700a046f

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In Nuclear and High Energy Physics

1. M. Drewes
2. R. Essig
3. K. Zurek
4. Tongyan Lin
5. M. Shaposhnikov
6. A. Ringwald
7. J. Redondo
8. Alexey Boyarsky

Citations in the corpus

• Direct detection of sub-GeV dark matter with semiconductor targets (2015, background): “[72, 73], and from gamma-rays in the Milky-Way halo [74].”
• A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, methodology): “In the keV–MeV mass range the search of the DM decay signal was conducted using space telescopes: XMM-Newton [735, 737–743], Chandra [744–750], Suzaku [751, 752], Swift [753], INTEGRAL [754, 755] and HEAO-1 [735] cosmic missions, as well as rocket-borne X-ray microcalorimeter [756] (see also [757] f”
• SIMP spectroscopy (2015, methodology): “These come from measurements of the CMB power spectrum [43] as well as from measurements of diffuse gamma-rays in the galactic halo [44].”
• Revisiting Supernova 1987A constraints on dark photons (2016, methodology): “Using the width calculated in the Euler-Heisenberg effective theory [47] and the model-independent bounds of diffuse X-ray background in [49] for a decay to two photons, which we multiply by 3/2 to account for the increased multiplicity in this model and rescale by the abundance from resonant produc”