Non-minimally coupled Scalar Dark Matter from Inflationary Fluctuations. (arXiv:1811.02649v1 [astro-ph.CO])

Non-minimally coupled Scalar Dark Matter from Inflationary Fluctuations. (arXiv:1811.02649v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Alonso_Alvarez_G/0/1/0/all/0/1">Gonzalo Alonso-&#xc1;lvarez</a>

It is well known that light scalar fields present during inflation are
coherently excited. We show that if the field couples to gravity in a
non-minimal way, the fluctuations at large scales are suppressed with respect
to the small scales ones. This fact allows for the field excitations to make a
sizeable contribution to the energy density of the universe without generating
too large isocurvature fluctuations at observable scales. We show that this
mechanism could generate all the observed dark matter and study the main
cosmological implications of this setup.

It is well known that light scalar fields present during inflation are
coherently excited. We show that if the field couples to gravity in a
non-minimal way, the fluctuations at large scales are suppressed with respect
to the small scales ones. This fact allows for the field excitations to make a
sizeable contribution to the energy density of the universe without generating
too large isocurvature fluctuations at observable scales. We show that this
mechanism could generate all the observed dark matter and study the main
cosmological implications of this setup.

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