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 Relative Articles Light sterile neutrino production in the early universe with dynamical neutrino asymmetries Chaos, Determinacy and Fractals in Active-Sterile Neutrino Oscillations in the Early Universe On the chaoticity of active-sterile neutrino oscillations in the early universe Active-sterile neutrino oscillations in the early Universe and the atmospheric neutrino anomaly Neutrino asymmetry generation in the early Universe (from active-sterile neutrino oscillations) Resonant Sterile Neutrino Dark Matter in the Local and High-z Universe Studies of neutrino asymmetries generated by ordinary-sterile neutrino oscillations in the early universe and implications for big bang nucleosynthesis bounds Solar neutrino spectrum, sterile neutrinos and additional radiation in the Universe Blocking Active-Sterile Neutrino Oscillations in the Early Universe with a Majoron Field The Accelerating Universe More...
Physics  2000

# Sterile Neutrino and Accelerating Universe

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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_{\nu_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?

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