Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-17
Phys.Rev.D78:123535,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages; v2: references added, matches version to be published
Scientific paper
10.1103/PhysRevD.78.123535
We propose the lightest supersymmetric particle (LSP) as a well-suited candidate for superheavy dark matter (SHDM). Various production mechanisms at the end of inflation can produce SHDM with the correct abundance, $\Omega_{LSP} h^2 \sim 0.1$, if its mass is sufficiently high. In particular, gravitational production requires that the mass $m_{LSP}$ of the LSP is above $3\times 10^{11} GeV$. Weak interactions remain perturbative despite the large mass hierarchy, $m_{LSP}\gg m_Z$, because of the special decoupling properties of supersymmetry. As a result the model is predictive and we discuss the relevant cosmological processes for the case of a superheavy neutralino within this scheme.
Berezinsky Veniamin
Kachelriess Michael
Solberg Aa. M.
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