Damping scales of neutralino cold dark matter

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dc.creatorHofmann, Stefan
dc.creatorSchwarz, Dominik J.
dc.creatorStoecker, Horst
dc.date2001-04-10
dc.date2001-08-29
dc.date.accessioned2026-07-07T11:28:46Z
dc.date.available2026-07-07T11:28:46Z
dc.descriptionThe 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 about 30 MeV (for typical neutralino and sfermion masses) and free streaming after last scattering of neutralinos. The last scattering temperature is lower than the kinetic decoupling temperature by one order of magnitude. 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 gravitationally bound neutralino clouds have to have masses above 10^(-7) solar masses.
dc.description13 pages, 5 figures; typos corrected; accepted by Physical Review D
dc.identifierhttps://arxiv.org/abs/astro-ph/0104173
dc.identifierhttp://arxiv.org/abs/astro-ph/0104173
dc.identifierPhys.Rev.D64:083507,2001
dc.identifierdoi:10.1103/PhysRevD.64.083507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196502
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDamping scales of neutralino cold dark matter
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