Cold + hot dark matter cosmology with m (muon-neutrino) approximates m (tau-neutrino) approximates 2.4-eV

Nov, 1994
7 pages
Published in:
  • Phys.Rev.Lett. 74 (1995) 2160-2163
e-Print:
Report number:
  • SCIPP-94-28

Citations per year

199420012008201520220204060
Abstract: (arXiv)
Cold + Hot Dark Matter (CHDM) Ω=1\Omega=1 cosmological models require a total neutrino mass 5\sim 5 eV. Because recent data support the νμντ\nu_\mu \to \nu_\tau oscillation explanation of the cosmic ray νμ\nu_\mu deficit, which requires that m(νμ)m(ντ)m(\nu_\mu) \approx m(\nu_\tau), this suggests that m(νμ)m(ντ)2.4m(\nu_\mu) \approx m(\nu_\tau) \approx 2.4 eV. The linear calculations and N-body simulation reported here indicate that an Ω=1\Omega=1 CHDM model with two 2.4 eV neutrinos (designated Cν 2\nu~2DM) agrees remarkably well with all available observations, but only if the Hubble parameter h0.5h \approx 0.5. We also show that even one 2.4 eV neutrino raises serious difficulties for low-Ω\Omega flat CDM models.
  • cosmological model
  • dark matter
  • neutrino: mass
  • mass: neutrino
  • neutrino: oscillation
  • cosmic background radiation
  • numerical calculations: interpretation of experiments
  • bibliography