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Damping scales of neutralino cold dark matter
Open accessAbstract
The lightest supersymmetric particle, most likely the neutralino, might account for a large fraction of dark matter in the Universe. We show that the primordial spectrum of density fluctuations in neutralino cold dark matter (CDM) has a sharp cutoff due to two damping mechanisms: collisional damping during the kinetic decoupling of the neutralinos at about 30 MeV (for typical neutralino and sfermion masses) and free streaming after the last scattering of neutralinos. The last scattering temperature is lower than the kinetic decoupling temperature by one order of magnitude. The cutoff in the primordial spectrum defines a minimal mass for CDM objects in hierarchical structure formation. For typical neutralino and sfermion masses the first gravitationally bound neutralino clouds have to have masses above ${10}^{\ensuremath{-}7}{M}_{\ensuremath{\bigodot}}.$
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Cites
Entropy Generation and the Survival of Protogalaxies in an Expanding Universe
Weinberg, S. (1971) · The Astrophysical Journal · doi:10.1086/151073 · Cited by 734
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Metadata
- Authors
- Hofmann, S., Schwarz, D. J., & Stöcker, H.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2001-09-25
- Volume
- 64
- Issue
- 8
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W2165897516
- Cited by
- 283
- References
- 1
- FWCI
- 3.32
- Type
- journal article
- Language
- en
- Open access
- green
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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