2005/12/31 by W.-S. Hou, Wei-Shu Hou, Andrea Soddu
Physics and Astronomy · #Anomaly (physics) #Astrophysics and Cosmic Phenomena #Dirac (video compression format) #Fourth generation #Lepton #Mixing (physics) #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Quark #Scale (ratio) #Seesaw molecular geometry #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.05.011
published as Phys.Lett.B638:229-233,2006 · Some minor corrections, 3 updated figures. Results and conclusions are mildly changed. To appear in Phys. Lett. B
arxiv created 2006/05/09 · openalex publication_date 2006/05/17 · arxiv updated 2011/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We extend the eV seesaw scenario to four lepton generations. The LSND anomaly is taken as the right-handed seesaw scale, i.e. mR ~ eV. The fourth generation then gives a heavy pseudo-Dirac neutrino which largely decouples from other generations, and is relatively stable. One effectively has a 3+3 solution to the LSND anomaly, where we illustrate with numerical solutions. Our study indicates that the third mixing angle sin2(theta13) is likely less than 0.01.