Cosmology of the invisible axion

Details Cosmology of the invisible axion Cosmology of the invisible axion

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phlb..120..127p&link_type=abstract

Physics Letters B, Volume 120, Issue 1-3, p. 127-132.

Physics

616

Scientific paper

We identify a new cosmological problem for models which solve the strong CP puzzle with an invisible axion, unrelated to the domain wall problem. Because the axion is very weakly coupled, the energy density stored in the oscillations of the classical axion field does not dissipate rapidly; it exceeds the critical density needed to close the universe unless fa <= 1012 GeV, where fa is the axion decay constant. If this bound is saturated, axions may comprise the dark matter of the universe.

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