Pathways to Naturally Small Neutrino Masses

1998/05/23 by Ernest Ma · 59 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1103/physrevlett.81.1171

published as Phys.Rev.Lett.81:1171-1174,1998 · 12 pages including 5 figures; corrected minus signs in Eqs.(5)-(6), no result is affected

arxiv created 1998/05/23 · openalex publication_date 1998/08/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

In the minimal standard electroweak gauge model, there is an effective dimension-five operator which generates neutrino masses, and it has only three tree-level realizations. One is the canonical seesaw mechanism with a right-handed neutrino. Another is having a heavy Higgs triplet as recently proposed. The third is to have a heavy Majorana fermion triplet, an example of which is presented here in the context of supersymmetric SU(5) grand unification. The three generic one-loop realizations of this operator are also discussed.

Citations

• Atmospheric ratio in the multi-GeV energy range

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