出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 cuto
due to two damping mechanisms: collisional damping during the kinetic decoupling of
the neutralinos at O(10 MeV) and free streaming after last scattering of neutralinos. The
cut-o
in the primordial spectrum de nes a minimal mass for CDM objects in hierarchical
structure formation. For typical neutralino and sfermion masses the rst gravitationally
bound neutralino clouds have masses above 10−6M .
