Quark Lepton Mass Hierarchies and the Baryon Asymmetry
arXiv:hep-ph/9810308 · doi:10.1016/S0370-2693(98)01480-4
Abstract
The mass hierarchies of quarks and charged leptons as well as a large $\n_\m$-$\n_\t$ mixing angle are naturally explained by the Frogatt-Nielsen mechanism with a nonparallel family structure of chiral charges. We extend this mechanism to right-handed neutrinos. Their out-of-equilibrium decay generates a cosmological baryon asymmetry whose size is quantized in powers of the hierarchy parameter $\e^2$. For the simplest hierarchy pattern the neutrino mass $\bar{m}_\n= (m_{\n_\m}m_{\n_\t})^{1/2} \sim 10^{-2}$ eV, which is inferred from present indications for neutrino oscillations, implies a baryon asymmetry . The corresponding baryogenesis temperature is GeV.
7 pages
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Cited by in corpus (108)
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