Unitarity limits on the mass and radius of dark-matter particles

Details Unitarity limits on the mass and radius of dark-matter particles Unitarity limits on the mass and radius of dark-matter particles

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..64..615g&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 64, Feb. 5, 1990, p. 615-618. Research supported by DOE. Previously announced in

Physics

178

Annihilation Reactions, Dark Matter, Neutrinos, Particle Mass, Thermodynamic Equilibrium, Universe, Cosmology, Radii

Scientific paper

Using partial wave unitarity and the observed density of the Universe, it is shown that a stable elementary particle which was once in thermal equilibrium cannot have a mass greater than 340 TeV. An extended object which was once in thermal equlibrium cannot have a radius less than 7.5 x 10-7 fm. A lower limit to the relic abundance of such particles is also found.

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