Abstract
If the baryon asymmetry in the present universe is generated by decays of the LH u flat direction, the observed baryon asymmetry requires the mass of the lightest neutrino to be much smaller than the mass scale indicated from the atmospheric and solar neutrino oscillations. Such a small mass of the lightest neutrino leads to a high predictability on the rate of the neutrinoless double beta (0 νββ) decay. In this Letter we show general predictions on the 0 νββ decay in the leptogenesis via the LH u flat direction.
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