Neutrino mixing and lepton flavour violation in SUSY-gut models Illana Calero, José Ignacio Masip Mellado, Manuel Decay Mass Presented at the XXVII International Conference of Theoretical Physics, "Matter to the Deepest", Ustron, Poland, september 15-21, 2003. In supersymmetric (SUSY) models the misalignment between fermion and sfermion families introduces unsuppressed flavour-changing processes. Even if the mass parameters are chosen to give no flavour violation, family dependent radiative corrections make this adjustment not stable. In par- ticular, due to the observed large neutrino mixings and potentially large neutrino Yukawa couplings, sizable lepton flavour violation (LFV) is ex- pected. After introducing the basic concepts, the framework and the main assumptions, we report on a recent study of rare leptonic decays in a class of SUSY–GUT models with three quasi-degenerate neutrinos. We show that LFV effects are likely visible in forthcoming experiments. 2014-07-07T11:59:01Z 2014-07-07T11:59:01Z 2003 info:eu-repo/semantics/article Illana, J.I.; Masip, M. Neutrino mixing and lepton flavour violation in SUSY-gut models. Acta Physica Polonica B, 34(11): 5413-5422 (2003). [http://hdl.handle.net/10481/32470] 0587-4254 http://hdl.handle.net/10481/32470 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Jagiellonian University