2004/10/10 by Hitoshi Murayama
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitino #Leptogenesis #Lepton #MAJORANA #Neutrino #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Philosophy #Physics #Seesaw mechanism #Seesaw molecular geometry #Sterile neutrino #Supersymmetry #Supersymmetry breaking #Symmetry breaking #hep-ph
paper · pdf · doi:10.1016/j.nuclphysbps.2004.10.071
published as Nucl.Phys.Proc.Suppl.137:206-219,2004 · Talk at Fujihara Seminar On Neutrino Mass And Seesaw Mechanism (SEESAW 1979-2004), 23-25 Feb 2004, KEK. 14 pages, uses espcrc2.sty
arxiv created 2004/10/10 · openalex publication_date 2004/12/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The seesaw mechanism is attractive not only because it "explains'' small neutrino mass, but also because of its packaging with the SUSY-GUT, leptogenesis, Dark Matter, and electroweak symmetry breaking. However, this package has the flavor, CP, and gravitino problems. I discuss two alternatives to the seesaw mechanism. In one of them, the anomaly-mediated supersymmetry breaking solves these problems, while predicts naturally light Dirac neutrinos. In the other, the light Majorana neutrinos arise from supersymmetry breaking with right-handed neutrinos below TeV, and the Dark Matter and collider phenomenology are significantly different.