%0 Journal Article
%T Gravitino, Axino, Kaluza-Klein Graviton Warm and Mixed Dark Matter and Reionisation
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Jedamzik, K.
%A Lemoine, M.
%A Moultaka, G.
%Z 6 pages, 3 figures
%< avec comité de lecture
%Z LPTA/05-30
%@ 1475-7508
%J Journal of Cosmology and Astroparticle Physics
%I Institute of Physics (IOP)
%V 07
%P 010
%8 2006
%D 2006
%Z astro-ph/0508141
%R 10.1088/1475-7516/2006/07/010
%K dark matter
%K cosmology of theories beyond the SM
%K power spectrum
%Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X Stable particle dark matter may well originate during the decay of long-lived relic particles, as recently extensively examined in the cases of the axino, gravitino, and higher-dimensional Kaluza-Klein (KK) graviton. It is shown that in much of the viable parameter space such dark matter emerges naturally warm/hot or mixed. %due to the kinetic energy imparted %on the dark matter particles during decay. In particular, decay produced gravitinos (KK-gravitons) may only be considered cold for the mass of the decaying particle in the several TeV range, unless the decaying particle and the dark matter particle are almost degenerate. Such dark matter candidates are thus subject to a host of cosmological constraints on warm and mixed dark matter, such as limits from a proper reionisation of the Universe, the Lyman-alpha forest, and the abundance of clusters of galaxies.. It is shown that constraints from an early reionsation epoch, such as indicated by recent observations, may potentially limit such warm/hot components to contribute only a very small fraction to the dark matter.
%G English
%L in2p3-00025722
%U https://hal.in2p3.fr/in2p3-00025722
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2