Oscillations and leptogenesis: what can we learn about right-handed neutrinos?
| dc.creator | Frigerio, Michele | |
| dc.date | 2003-12-01 | |
| dc.date | 2004-04-07 | |
| dc.date.accessioned | 2026-07-07T03:51:26Z | |
| dc.date.available | 2026-07-07T03:51:26Z | |
| dc.description | 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 $ε_i$ generated in their decays. Unless special cancellations take place, one finds $M_i\propto m_{Di}^2$ and the generated baryon-to-photon ratio $η_B$ 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 $N_2$. | |
| dc.description | 20 pages, latex, 1 figure. References added | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0312023 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0312023 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/43094 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Oscillations and leptogenesis: what can we learn about right-handed neutrinos? | |
| dc.type | text |