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Abstract:
We discuss a category of stable dark matter particles which are weakly interacting and related to the superstructure of the universe.These particles may be degenerate fermions and the bosons near a high temperature state.In both cases,we deduce that the particle mass is ~10-1eV and the absolute value of its chemical potential is <<10-1eV.This result is not in contradiction with the dip phenomena of the ultra high energy primary cosmic ray spectrum at ~1015eV and ~1018eV.
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