Neutralino with the Right Cold Dark Matter Abundance in (Almost) Any Supersymmetric Model

Details Neutralino with the Right Cold Dark Matter Abundance in (Almost) Any Supersymmetric Model Neutralino with the Right Cold Dark Matter Abundance in (Almost) Any Supersymmetric Model

2006-02-24

arxiv.org/abs/hep-ph/0602230v1

Phys.Rev. D74 (2006) 023510

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure

Scientific paper

10.1103/PhysRevD.74.023510

We consider non-standard cosmological models in which the late decay of a scalar field $\phi$ reheats the Universe to a low reheating temperature, between 5 MeV and the standard freeze-out temperature of neutralinos of mass $m_{\chi}$. We point out that in these models all neutralinos with standard density $\Omega_{\rm std} \gtrsim 10^{-5} (100 {\rm GeV}/m_\chi)$ can have the density of cold dark matter, provided the right combination of the following two parameters can be achieved in the high energy theory: the reheating temperature, and the ratio of the number of neutralinos produced per $\phi$ decay over the $\phi$ field mass. We present the ranges of these parameters where a combination of thermal and non-thermal neutralino production leads to the desired density, as functions of $\Omega_{\rm std}$ and $m_{\chi}$.

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