Reheating-temperature independence of cosmological baryon asymmetry in Affleck-Dine leptogenesis - art. no. 123513

In this paper we point out that the cosmological baryon asymmetry in our un iverse is generated almost independently of the reheating temperature T-R i n Affleck-Dine leptogenesis and it is determined mainly by the mass of the lightest neutrino, m(v1), in a wide range of reheating temperature T-R simi lar or equal to 10(5) - 10(12) GeV. The present baryon asymmetry predicts t he m(v1) in a narrow region m(v1) similar or equal to (0.1-3) x 10(-9) eV. Such a small mass of the lightest neutrino leads to a high predictability o n the mass parameter m(veve) contributing to the neutrinoless double beta d ecay. We also propose an explicit model in which such an ultralight neutrin o can be naturally obtained.