Key points are not available for this paper at this time.
The possibility of unstable neutrino reheating of the universe is considered in detail. The evolution equation is integrated numerically with all relevant thermal processes taken into account. We have shown that neutrino reheating can account for the observed distortion of the cosmic background radiation on the short-wavelength side of the peak and that this scenario is consistent with extragalactic background light observations from ultraviolet to infrared regions, if reheating occurs at z ~ 10⁴^-10⁵^ by heavy neutrinos with a mass 20-10³^ keV and a photon branching ratio specified by the energetics. Other physical and astrophysical implications are also discussed.
Fukugita et al. (Sun,) studied this question.