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- W1517632969 abstract "Inverting the type-I seesaw formula, we reconstruct the mass matrix of the heavy right-handed neutrinos $N_i$. We analyze how the data on neutrino oscillations affect the structure of this matrix. Under the assumption of hierarchical Dirac-type neutrino masses $m_{Di}$, we compute the mixing angles among $N_i$, their masses $M_i$ and the lepton asymmetries $epsilon_i$ generated in their decays. Unless special cancellations take place, one finds $M_ipropto m_{Di}^2$ and the generated baryon-to-photon ratio $eta_B$ is much smaller than the observed value. We show that successful baryogenesis via leptogenesis occurs in a unique special case, which corresponds to mass degeneracy and maximal mixing of $N_1$ and $N_2$." @default.
- W1517632969 created "2016-06-24" @default.
- W1517632969 creator A5033062323 @default.
- W1517632969 date "2003-12-01" @default.
- W1517632969 modified "2023-10-01" @default.
- W1517632969 title "Oscillations and leptogenesis: what can we learn about right-handed neutrinos?" @default.
- W1517632969 hasPublicationYear "2003" @default.
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