Reheating temperature independence of cosmological baryon asymmetry in Affleck-Dine leptogenesis

Feb, 2001
22 pages
Published in:
  • Phys.Rev.D 63 (2001) 123513
e-Print:
Report number:
  • UT-924

Citations per year

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Abstract:
In this paper we point out that the cosmological baryon asymmetry in our universe is generated almost independently of the reheating temperature TRT_R in Affleck-Dine leptogenesis and it is determined mainly by the mass of the lightest neutrino, mν1m_{\nu_1}, in a wide range of the reheating temperature TR105T_R\simeq 10^5--101210^{12} GeV. The present baryon asymmetry predicts the mν1m_{\nu_1} in a narrow region, mν1(0.3m_{\nu_1}\simeq (0.3--1)×1091)\times 10^{-9} eV. Such a small mass of the lightest neutrino leads to a high predictability on the mass parameter mνeνem_{\nu_e \nu_e} contributing to the neutrinoless double beta decay. We also propose an explicit model in which such an ultralight neutrino can be naturally obtained.
  • baryon: asymmetry
  • lepton: production
  • neutrino: mass
  • double-beta decay: (0neutrino)
  • field theory: scalar
  • inflation
  • neutrino: oscillation
  • neutrino: solar
  • numerical calculations: interpretation of experiments
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