Charged Lepton Decays L_i to L_j + gamma, Leptogenesis CP-Violating Parameters and Majorana Phases
| dc.creator | Petcov, S. T. | |
| dc.creator | Shindou, T. | |
| dc.date | 2006-05-12 | |
| dc.date | 2006-09-27 | |
| dc.date.accessioned | 2026-07-07T10:41:35Z | |
| dc.date.available | 2026-07-07T10:41:35Z | |
| dc.description | 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>. | |
| dc.description | 27 pages, 5 figures, version to be published in Physical Review D | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0605151 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0605151 | |
| dc.identifier | Phys.Rev.D74:073006,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.073006 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/181666 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Charged Lepton Decays L_i to L_j + gamma, Leptogenesis CP-Violating Parameters and Majorana Phases | |
| dc.type | text |