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CMB constraints on dark matter models with large annihilation cross section

Open access
Galli, Silvia, Iocco, Fabio, Bertone, Gianfranco, Melchiorri, Alessandro·2009·Physical Review D

Abstract

The injection of secondary particles produced by dark matter (DM) annihilation around redshift $\ensuremath{\sim}1000$ 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.

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Metadata

Authors
Galli, S., Iocco, F., Bertone, G., & Melchiorri, A.
Venue
Physical Review D
Published
2009-07-08
Volume
80
Issue
2
ISSN
  • 0556-2821 (ISSN-L)
  • 1550-7998
  • 1550-2368
OpenAlex
W2142290259
Cited by
327
References
2
FWCI
20.87
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: CMB constraints on dark matter models with large annihilation cross section. https://app.cochat.ai/papers/10.1103/physrevd.80.023505
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Galli, S., Iocco, F., Bertone, G., & Melchiorri, A. (2009). CMB constraints on dark matter models with large annihilation cross section. Physical Review D. https://doi.org/10.1103/physrevd.80.023505

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