Supersymmetric superheavy dark matter
نویسندگان
چکیده
منابع مشابه
Superheavy dark matter
We show that, contrary to the standard lore, dark matter may be superheavy (many orders of magnitude larger than the weak scale). We show that massive particles may be produced naturally during the transition from the inflationary phase to either a matter-dominated or radiation-dominated phase as a result of the expansion of the background spacetime acting on vacuum quantum fluctuations of the ...
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In the standard dark matter scenarios, WIMPs are usually considered to have once been in local thermodynamic equilibrium (LTE), and their present abundance is determined by their self-annihilation cross section. In that case, unitarity and the lower bound on the age of the universe constrains the mass of the relic to be less than 500 TeV. 1 On the other hand, if the DM particles never attained ...
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Recent cosmological data allow to determine the universal Dark Matter (DM) density to a precision of about 10%, if a simple, well–motivated ansatz for the spectrum of primordial density perturbations is correct. Not surprisingly, a thermal neutralinõ χ 0 1 will have the correct relic density only in " small " regions of parameter space. In particular, for fixed values of the other parameters, t...
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We show that there are discrete gauge symmetries protect naturally heavy X particles from decaying into the ordinary light particles in the supersymmetric standard model. This makes the proposal very attractive that the superheavy X particles constitute a part of the dark matter in the present universe. It is more interesting that there are a class of discrete gauge symmetries which naturally a...
متن کاملOn Supersymmetric Dark Matter
The extra particles provided by Supersymmetry(SUSY) appear as natural candidates for exotica such as the missing Dark Matter of the Universe. The particle candidates for Dark Matter, and the basic elements of the minimal supersymmetric extension of the Standard Model are reviewed. The needed elements to compute the neutralino counting rate are given, considering new Yukawa loop corrections to t...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.78.123535