2006/12/31 by Biswajoy Brahmachari, Nobuchika Okada · 1 citation
Mathematics · Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Asymmetry #Baryon #Baryon asymmetry #CP violation #Dirac (video compression format) #Geometry #Inverse #Leptogenesis #Lepton #Massless particle #Mathematics #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Universe #hep-ph
paper · pdf · doi:10.1016/j.physletb.2008.01.043
published as Phys.Lett.B660:508-514,2008 · version accepted in Phys. Lett. B
openalex publication_date 2008/02/01 · arxiv created 2008/02/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In an economical system with only two heavy right-handed neutrinos, we postulate a new texture for 3×2 Dirac mass matrix mD. This model implies one massless light neutrino and thus displays only two patterns of mass spectrum for light neutrinos, namely hierarchical or inverse-hierarchical. Both the cases can correctly reproduce all the current neutrino oscillation data with a unique prediction mνeνe=Δmsolar23 and Δmatm2 for the hierarchical and the inverse-hierarchical cases, respectively, which can be tested in next generation neutrino-less double beta decay experiments. Introducing a single physical CP phase in mD, we examine baryon asymmetry through leptogenesis. Interestingly, through the CP phase there are correlations between the amount of baryon asymmetry and neutrino oscillation parameters. We find that for a fixed CP phase, the hierarchical case also succeeds in generating the observed baryon asymmetry in our universe, plus a non-vanishing Ue3 which is accessible in future baseline neutrino oscillation experiments.