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Cosmic ray-dark matter scattering: A new signature of (asymmetric) dark matter in the gamma ray sky

Profumo, S.
•
Ubaldi, L.
2011
  • journal article

Periodico
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Abstract
We consider the process of scattering of Galactic cosmic-ray electrons and protons off of dark matter with the radiation of a final-state photon. This process provides a novel way to search for Galactic dark matter with gamma rays. We argue that for a generic weakly interacting massive particle, barring effects such as co-annihilation or a velocity-dependent cross section, the gamma-ray emission from cosmic-ray scattering off of dark matter is typically smaller than that from dark matter pair-annihilation. However, if dark matter particles cannot pair-annihilate, as is the case for example in asymmetric dark matter scenarios, cosmic-ray scattering with final state photon emission provides a unique window to detect a signal from dark matter with gamma rays. We estimate the expected flux level and its spectral features for a generic supersymmetric setup, and we also discuss dipolar and luminous dark matter. We show that in some cases the gamma-ray emission might be large enough to be detectable with the Fermi Large Area Telescope. © 2011 IOP Publishing Ltd and SISSA.
DOI
10.1088/1475-7516/2011/08/020
WOS
WOS:000294758200020
Archivio
http://hdl.handle.net/20.500.11767/91587
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-80052530174
https://doi.org/10.1088/1475-7516/2011/08/020
https://arxiv.org/abs/1106.4568
Diritti
metadata only access
Soggetti
  • cosmic ray theory

  • dark matter detector

  • dark matter theory

  • gamma ray theory

  • Astronomy and Astroph...

Web of Science© citazioni
13
Data di acquisizione
Mar 17, 2024
Visualizzazioni
4
Data di acquisizione
Apr 19, 2024
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