Sterile Neutrino and Accelerating Universe

Abstract

If all three neutrino oscillation data were to be confirmed in the near future, it is probable that one might need a sterile neutrino, in addition to the three active ones. This sterile neutrino, nu_S, would be very light with mass m_{nu_S} less than or equal to 1 eV or even with m_{ν_S} approximately 10^{-3} eV according to some scenarios. Why would it be so light? On another front, recent cosmological observations and analyses appear to indicate that the present universe is flat and accelerating, and that the present energy density is dominated by a ``dark variety'', with rho_V approximately (10^{-3}eV)^4. Is it a constant? Is there a link between these apparently unrelated phenomena?

11 pages, REVTEX

Cited by in corpus (10)

• Dark Energy from Mass Varying Neutrinos
• Solar mass-varying neutrino oscillations
• Scalar Non-Standard Interactions in Neutrino Oscillation
• Supersymmetric Theories of Neutrino Dark Energy
• Classification of dark energy models in the (w_0,w_a) plane
• Confronting mass-varying neutrinos with MiniBooNE
• A new search for anomalous neutrino oscillations at the CERN-PS
• Neutrino Dark Energy With More Than One Neutrino Species
• Implications of right-handed neutrinos with electroweak-scale masses
• Probing the variation of relic neutrino masses with extremely high-energy cosmic neutrinos