Charged Lepton Decays L_i to L_j + gamma, Leptogenesis CP-Violating Parameters and Majorana Phases
| dc.contributor.area | Physics | en_US |
| dc.contributor.author | Petcov, Serguey T. | en_US |
| dc.contributor.author | Shindou, Tetsuo | en_US |
| dc.contributor.department | Elementary Particle Theory | en_US |
| dc.date.accessioned | 2006-06-13T07:46:15Z | en_US |
| dc.date.accessioned | 2011-09-07T20:27:37Z | |
| dc.date.available | 2006-06-13T07:46:15Z | en_US |
| dc.date.available | 2011-09-07T20:27:37Z | |
| dc.date.issued | 2006-06-13T07:46:15Z | en_US |
| dc.description.abstract | We analyse the dependence of the rates of the LFV charged lepton decays mu to e + gamma, tau to e + gamma, tau to mu + gamma (l_i to l_j + gamma) and their ratios, predicted in the class of SUSY theories with see-saw mechanism of nu-mass generation and soft SUSY breaking with universal boundary conditions at the GUT scale, on the Majorana CP-violation phases in the PMNS neutrino mixing matrix and the ``leptogenesis'' CP-violating (CPV) parameters. The case of quasi-degenerate in mass heavy Majorana neutrinos is considered. The analysis is performed for normal hierarchical (NH), inverted hierarchical (IH) and quasi-degenerate (QD) light neutrino mass spectra. We show, in particular, that for NH and IH nu-mass spectrum and negligible lightest neutrino mass, all three l_i to l_j + gamma decay branching ratios, BR(l_i to l_j + gamma), depend on one Majorana phase, one leptogenesis CPV parameter and on the 3-neutrino oscillation parameters; if the CHOOZ mixing angle theta_13 is sufficiently large, they depend on the Dirac CPV phase in the PMNS matrix. The ``double ratios'' R(21/31) sim BR(mu to e + gamma)/BR(tau to e + gamma) and R(21/32) sim BR(mu to e + gamma)/BR(tau to mu + gamma) are determined by these parameters. The same Majorana phase enters into the NH and IH expressions for the effective Majorana mass in neutrinoless double beta decay, <m>. | en_US |
| dc.format.extent | 643429 bytes | en_US |
| dc.format.mimetype | application/pdf | en_US |
| dc.identifier.citation | Phys. Rev. D 74 (2006) 073006 | en_US |
| dc.identifier.uri | https://openscience.sissa.it/handle/1963/1832 | en_US |
| dc.language.iso | en_US | en_US |
| dc.relation.ispartofseries | SISSA;26/2006/EP | en_US |
| dc.relation.ispartofseries | arXiv.org;hep-ph/0605151 | en_US |
| dc.relation.uri | 10.1103/PhysRevD.74.073006 | en_US |
| dc.title | Charged Lepton Decays L_i to L_j + gamma, Leptogenesis CP-Violating Parameters and Majorana Phases | en_US |
| dc.type | Preprint | en_US |