Updated CMB constraints on dark matter annihilation cross sections
By S. Galli, F. Iocco, G. Bertone, A. Melchiorri. 2011
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Institute for Theoretical Physics, Univ. of Zu¨rich, Winterthurerst. 190, 8057 Zu¨rich CHThe injection of secondary particles produced by Dark Matter (DM) annihilation at redshift100 <∼ z <∼ 1000 affects the process of recombination, leaving an imprint on Cosmic MicrowaveBackground (CMB) anisotropies. Here we provide a new assessment of the constraints set by CMBdata on the mass and self-annihilation cross-section of DM particles. Our new analysis includes themost recent WMAP (7-year) and ACT data, as well as an improved treatment of the time-dependentcoupling between the DM annihilation energy with the thermal gas. We show in particular that theimproved measurement of the polarization signal places already stringent constraints on light DMparticles, ruling out ‘thermal’ WIMPs with mass m
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/475f246cd171ab79d079406886e8f390897b5bf7
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Citations in the corpus
- Astrophysical models for the origin of the positron (2011, background): “more stringent limits have been derived from gamma rays, starting from the exploratory studies [42, 43] to the more recent ones in [44, 45], which add to stringent bounds following from cosmic microwave background data (for a recent study see [46]), antiprotons [47], or radio data [48, 49].”
- Semiconductor Probes of Light Dark Matter (2012, background): “Current dark matter annihilation searches such as Fermi LAT [51], and bounds on dark matter annihilation rates in the early universe from WMAP and ACT [52] also provide limits to DM dipole moments.”
- The effects of QCD equation of state on the relic density of WIMP dark matter (2015, methodology): “Successful WIMP candidates must therefore not only satisfy the relic abundance constraint, but also constraints coming from direct [15–17] and indirect [18–22] detection experiments.”
- Background model systematics for the Fermi GeV excess (2014, background): “Finally, limits from observations of the cosmic microwave background constrain leptonic models for DM annihilation [135–139], though not at a level that is relevant for the GCE right now.”
- Galactic Searches for Dark Matter (2012, methodology): “ into electrons the limits on the annihilation cross section reach the thermal relic scale at a WIMP mass of approximately 10 GeV, and are a factor of a few weaker for direct annihilation into muons (Galli et al., 2011). Data from the Planck satellite mission, which will be released in 2013, is expe”
- Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects (2012, background): “Furthermore, one should appreciate the fact that both CMB [237–239] and cosmic ray antiproton data [240] provide very stringent constraints on the possibility of O(10) GeV WIMP DM – even though such a possibility might be interesting from the point of view of direct DM searches [241–244].”
- Constraining light dark matter with diffuse X-ray and gamma-ray observations (2013, background): “Constraints from the Cosmic Microwave Background (CMB) already limit the s-wave DM annihilation cross section to SM matter to be below that of a thermal WIMP, for DM masses below ∼ 7 GeV [24–27].”
- The Atacama Cosmology Telescope: cosmological parameters from three seasons of data (2013, unknown): “Various authors have explored possible models which lead to excess damping of the Silk damping tail (e.g., Galli et al. 2011; Calabrese et al. 2011a,b; Hasenkamp 2012; Hamann 2012; Menestrina & Scherrer 2012; Foot 2012; Abazajian et al. 2011; Menegoni et al. 2012; Farhang et al. 2013).”