Superweakly interacting massive particle dark matter signals from the early Universe

By Jonathan L. Feng, A. Rajaraman, F. Takayama. 2003

219 citations recorded by the source corpus.

Cold dark matter may be made of superweakly interacting massive particles, super-WIMP's, that naturally inherit the desired relic density from late decays of metastable WIMP's. Well-motivated examples are weak-scale gravitinos in supergravity and Kaluza-Klein gravitons from extra dimensions. These particles are impossible to detect in all dark matter experiments. We find, however, that super-WIMP dark matter may be discovered through cosmological signatures from the early Universe. In particular, super-WIMP dark matter has observable consequences for big bang nucleosynthesis and the cosmic microwave background (CMB), and may explain the observed underabundance of ${}^{7}\mathrm{Li}$ without upsetting the concordance between deuterium and CMB baryometers. We discuss the implications for future probes of CMB blackbody distortions and collider searches for new particles. In the course of this study, we also present a model-independent analysis of entropy production from late-decaying particles in light of Wilkinson microwave anisotropy probe data.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/37324a5b5a6b96a997c0aa6e3f9452d1d5deb385

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In Astronomy and Astrophysics

  1. J. Silk
  2. Julien Lesgourgues
  3. M. Liguori
  4. L. Verde
  5. N. Palanque-Delabrouille
  6. A. Banday
  7. Pedro G. Ferreira
  8. Volker Springel

In Nuclear and High Energy Physics

  1. J. Silk
  2. N. Palanque-Delabrouille
  3. J. Chluba
  4. Julien Lesgourgues
  5. Pedro G. Ferreira
  6. M. Lattanzi
  7. A. Melchiorri
  8. Martin Kunz

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