2014/01/31 by Heinrich Päs, Erik Schumacher · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Dirac (video compression format) #Leptogenesis #Lepton #MAJORANA #Neutrino #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Yukawa potential #hep-ph
paper · pdf · doi:10.1103/physrevd.89.096010
published as Phys. Rev. D 89, 096010 (2014) · 8 pages, 2 figures; updated with version published in PRD
openalex publication_date 2014/05/27 · arxiv created 2014/06/24 · arxiv updated 2014/06/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss neutrino masses and mixing in the context of seesaw type I models with three right-handed Majorana neutrinos and an approximately diagonal Dirac sector. This ansatz is motivated by the idea that the flavor structure in the right-handed Majorana masses is responsible for the large mixing angles, whereas the small mixing angle \ensuremathθ13 originates from the Dirac Yukawa couplings in analogy to the quark sector. To obtain \ensuremathθ13\ensuremath≈0.15 we study a possible SU(5) grand unified theory realization with a U(1)\ifmmode×\else\texttimes\fiℤ2^\ensuremath'\ifmmode×\else\texttimes\fiℤ2^\ensuremath'\ensuremath'\ifmmode×\else\texttimes\fiℤ2^\ensuremath'\ensuremath'\ensuremath' flavor symmetry and include a complex perturbation parameter in the Dirac mass matrix. The consequences for CP violating phases and effects on leptogenesis are investigated.