Damping of inhomogeneities in neutralino dark matter

  • 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 cut-off due to two damping mechanisms: collisional damping during the kinetic decoupling of the neutralinos at (10 MeV) and free streaming after last scattering of neutralinos. The cut-off in the primordial spectrum defines a minimal mass for CDM objects in hierarchical structure formation. For typical neutralino and sfermion masses the first gravitionally bound neutralino clouds have masses above 10 -6 M .

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Author:Dominik J. Schwarz, Stefan Hofmann, Horst StöckerORCiDGND
Document Type:Article
Date of Publication (online):2005/11/17
Year of first Publication:2001
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/11/17
Tag:dunkle Materie; neutralino; supersymmetrische Partikel
dark matter; neutralino; supersymmetric particle
In *Budapest 2001, High energy physics* hep2001/20. [astro-ph/0110601]
Source:In *Budapest 2001, High energy physics* hep2001/20. [astro-ph/0110601]
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht