2004/07/13 by S. M. Barr, Bumseok Kyae · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.70.075005
published as Phys.Rev.D70:075005,2004 · 30 pages
arxiv created 2004/07/13 · openalex publication_date 2004/10/06 · arxiv updated 2011/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In realistic grand unified models there are typically extra vectorlike matter multiplets at the GUT-scale that are needed to explain the family hierarchy. These contain neutrinos that, when integrated out, can modify the usual neutrino seesaw formula. A general analysis is given. It is noted that such modifications can explain why the neutrinos do not exhibit a strong family hierarchy like the other types of fermions.