CMB constraints on dark matter models with large annihilation cross section

By S. Galli, F. Iocco, G. Bertone, A. Melchiorri. 2009

287 citations recorded by the source corpus.

The injection of secondary particles produced by dark matter (DM) annihilation around redshift {approx}1000 would inevitably affect the process of recombination, leaving an imprint on cosmic microwave background (CMB) anisotropies and polarization. We show that the most recent CMB measurements provided by the WMAP satellite mission place interesting constraints on DM self-annihilation rates, especially for models that exhibit a large Sommerfeld enhancement of the annihilation cross section, as recently proposed to fit the PAMELA and ATIC results. Furthermore, we argue that upcoming CMB experiments such as Planck, will improve the constraints by at least 1 order of magnitude, thus providing a sensitive probe of the properties of DM particles.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/42e09ab96077a2287abaf371df4e1cf3cc492a79

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In Astronomy and Astrophysics

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2. D. Baumann
3. A. Ferrara
4. Xingang Chen
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In Nuclear and High Energy Physics

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Citations in the corpus

• Composite scalar dark matter (2012, unknown): “50 GeV [39].”
• 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.”
• The evolution of CMB spectral distortions in the early Universe (2011, background): “This suggests that the bounds onfann derived from the CMB anisotropies (Slatyer et al. 2009; Galli et al. 2009; Hütsi et al. 2009, 2011) already now might be in tension with this heating mechanism, however, the energy release from acoustic waves only goes into heating of the medium, while for…”
• History of dark matter (2018, unknown): “…as a possible signal of annihilating dark matter, this possibility is now strongly constrained by a variety of arguments (Bertone et al., 2009; Galli et al., 2009; Slatyer, Padmanabhan, and Finkbeiner, 2009), and plausible astrophysical explanations have also been proposed (Hooper, Blasi, and…”
• PICO: Probe of Inflation and Cosmic Origins (2019, background): “• Dark Matter CMB experiments are effective in constraining dark matter candidates in the lower mass range, which is not available for terrestrial direct detection experiments [7–12].”
• Reionization and the Cosmic Dawn with the Square Kilometre Array (2012, background): “The ΛCDM model of the Universe predicts that the very first luminous objects may have appeared around a redshift of 50, but it took until much later, z .”