2002/10/12 by Yoshio Koide, Koide, Yoshio, Joe Sato +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0210188
6 pages, Revtex, no figure
arxiv created 2002/10/12 · openalex publication_date 2002/10/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The radiatively induced neutrino mass matrix is investigated on the basis of an SU(5) SUSY model. In order to evade the proton decay, an ansatz based on a discrete symmetry Z2 is assumed: although, at the unification scale, we have two types of superfields ΨL(±)=5L(±)+10L(±), which are transformed as ΨL(±) → ± ΨL(±) under the discrete symmetry Z2, the particles ΨL(+) are decoupled after the SU(5) symmetry is broken, so that our quarks and leptons belong to ΨL(-). The R-parity-violating terms for our quarks and leptons ΨL(-) are basically forbidden under the symmetry Z2. However, we assume that mixings between members of ΨL(+) and those of ΨL(-) are in part caused after SU(5) is broken. As a result, the R-parity-violating interactions are in part allowed, so that the neutrino masses are radiatively generated, while the proton decay due to the R-parity violating terms is still forbidden because the term dRc dRc uRc has z=-1.