Cosmic Fluctuations and Dark Matter from Scalar Field Oscillations

Details Cosmic Fluctuations and Dark Matter from Scalar Field Oscillations Cosmic Fluctuations and Dark Matter from Scalar Field Oscillations

1994-12-15

arxiv.org/abs/astro-ph/9412054v4

Phys.Rev.Lett. 74 (1995) 3105-3108

Astronomy and Astrophysics

Astrophysics

5 pages, REVTeX. Final version, published in Physical Review Letters 74, 3105, 1995

Scientific paper

10.1103/PhysRevLett.74.3105

Scale-invariant fluctuations and cold dark matter could originate from two different modes of a single scalar field, fluctuations from massless Goldstone oscillations and matter from massive Higgs modes. Matching the fluctuations and dark matter density observed requires a heavy scale ($\phi_0\approx 10^{16}$GeV) for the potential minimum and an extremely small self coupling ($\lambda\approx 10^{-83}$). Mode coupling causes the dark matter to form in lumps with nonnegligible velocities, leading to early collapse of dense dark matter ``miniclusters'' and halos on the scale of compact dwarf galaxies.

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