Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons

Details Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons

1995-05-12

arxiv.org/abs/astro-ph/9505060v1

Phys.Rev.Lett.75:2077-2080,1995

Astronomy and Astrophysics

Astrophysics

15 pages (including 2 figs.), uuencoded compressed postscript; also available on www at http://www-astro-theory.fnal.gov/ unde

Scientific paper

10.1103/PhysRevLett.75.2077

We explore the cosmological implications of an ultra-light pseudo-Nambu-Goldstone boson. With global spontaneous symmetry breaking scale $f \simeq 10^{18}$ GeV and explicit breaking scale comparable to MSW neutrino masses, $M \sim 10^{-3}$ eV, such a field, which acquires a mass $m_\phi \sim M^2/f \sim H_0$, would have become dynamical at recent epochs and currently dominate the energy density of the universe. The field acts as an effective cosmological constant for several expansion times and then relaxes into a condensate of coherent non-relativistic bosons. Such a model can reconcile dynamical estimates of the density parameter, $\Omega_m \sim 0.2$, with a spatially flat universe, and can yield an expansion age $H_0 t_0 \simeq 1$ while remaining consistent with limits from gravitational lens statistics.

Affiliated with

Also associated with

No associations

Rating

Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-142496