2019/05/31 by H. Benaoum, H. B. Benaoum, S. H. Shaglel +1 · 1 citation
Physics and Astronomy · #Ansatz #Astrophysics and Cosmic Phenomena #Baryon asymmetry #Dirac (video compression format) #Double beta decay #Leptogenesis #Lepton #MAJORANA #Mass matrix #Mathematical physics #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Seesaw mechanism #Sterile neutrino #hep-ph
paper · pdf · doi:10.1142/s0217751x20500773
published as International Journal of Modern Physics A35, 2050077, 2020 · 25 pages, 10 figues, revised version
openalex created_date 2019/05/29 · arxiv created 2019/12/10 · openalex publication_date 2020/06/12 · arxiv updated 2020/11/10 · openalex updated_date 2026/08/05
We propose a new scaling ansatz in the neutrino Dirac mass matrix to explain the low energy neutrino oscillations data, baryon number asymmetry and neutrinoless double beta decay. In this work, a full reconstruction of the neutrino Dirac mass matrix has been realized from the low energy neutrino oscillations data based on type-I seesaw mechanism. A concrete model based on [Formula: see text] flavor symmetry has been considered to generate such a neutrino Dirac mass matrix and imposes a relation between the two scaling factors. In this model, the right-handed Heavy Majorana neutrino masses are quasi-degenerate at TeV mass scales. Extensive numerical analysis studies have been carried out to constrain the parameter space of the model from the low energy neutrino oscillations data. It has been found that the parameter space of the Dirac mass matrix elements lies near or below the MeV region and the scaling factor [Formula: see text] has to be less than 10. Furthermore, we have examined the possibility for simultaneous explanation of both neutrino oscillations data and the observed baryon number asymmetry in the Universe. Such an analysis gives further restrictions on the parameter space of the model, thereby explaining the correct neutrino data as well as the baryon number asymmetry via a resonant leptogenesis scenario. Finally, we show that the allowed space for the effective Majorana neutrino mass [Formula: see text] is also constrained in order to account for the observed baryon asymmetry.