Octant Degeneracy, Quadrant of leptonic CPV phase at Long Baseline Neutrino Experiments and Baryogenesis

Abstract

In a recent work by us, we have studied, how CP violation discovery potential can be improved at long baseline neutrino experiments (LBNE/DUNE), by combining with its ND (near detector) and reactor experiments. In this work, we discuss how this study can be further analysed to resolve entanglement of the quadrant of leptonic CPV phase and Octant of atmospheric mixing angle ${\theta }_{23}$, at LBNEs. The study is done for both NH (Normal hierarchy) and IH (Inverted hierarchy), HO (Higher Octant) and LO (Lower Octant). We show how baryogenesis can enhance the effect of resolving this entanglement, and how possible values of the leptonic CP-violating phase ${\delta }_{CP}$ can be predicted in this context. With respect to the latest global fit data of neutrino mixing angles, we predict the values of ${\delta }_{CP}$ for different cases. In this context we present favoured values of ${\delta }_{CP}$ (${\delta }_{CP}$ range at $\ge$ 2$\sigma$ ) constrained by the latest updated BAU range and also confront our predictions of ${\delta }_{CP}$ with an up-to-date global analysis of neutrino oscillation data. We find that some region of the favoured ${\delta }_{CP}$ parameter space lies within the best fit values around ${\delta }_{CP}\simeq 1.3\pi -1.4\pi$. A detailed analytic and numerical study of baryogenesis through leptogenesis is performed in this framework in a model independent way.

14 pages, 5 figures, 2 Tables, New Analysis

References in corpus (19)

• Observation of electron-antineutrino disappearance at Daya Bay
• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Global status of neutrino oscillation parameters after Neutrino-2012
• Global fit to three neutrino mixing: critical look at present precision
• Neutrino oscillations refitted
• Improved Measurement of Electron Antineutrino Disappearance at Daya Bay
• Measurements of neutrino oscillation in appearance and disappearance channels by the T2K experiment with 6.6E20 protons on target
• Fermion Masses in SO(10) Models
• Leptogenesis with TeV Scale Inverse Seesaw in SO(10)
• Connecting Leptogenesis to CP Violation in Neutrino Mixings in a Tri-bimaximal Mixing model
• Leptogenesis in SO(10)
• Determining the Octant of ${\theta }_{23}$ at LBNE in conjunction with Reactor Experiments
• The sensitivity of the ICAL detector at India-based Neutrino Observatory to neutrino oscillation parameters
• Prediction of Leptonic CP Phase in $A_4$ symmetric model
• Leptogenesis in Realistic SO(10) Models
• Discriminating Majorana Neutrino Textures in the light of Baryon Asymmetry
• Probing CP violation at LBNE with reactor experiments
• Neutrino Mixing and Leptogenesis in $\mu -\tau$ Symmetry
• The Dark Side of ${\theta }_{13}$, ${\delta }_{CP}$, Leptogenesis and Inflation in Type-I Seesaw

Cited by in corpus (7)

• Probing Majorana Neutrino Textures at DUNE
• Understanding the degeneracies in NO$\nu$A data
• Non$-$zero ${\theta }_{13}$ and ${\delta }_{CP}$ phase with $A_4$ Flavor Symmetry and Deviations to Tri$-$Bi$-$Maximal mixing via $Z_2\times Z_2$ invariant perturbations in the Neutrino sector
• Fully Constrained Majorana Neutrino Mass Matrices Using $\Sigma (72\times 3)$
• Effects Of leptonic non-unitarity on lepton flavor violation, neutrino oscillation, leptogenesis and lightest neutrino mass
• Significance of broken $\mu -\tau$ Symmetry in correlating ${\delta }_{CP}$, ${\theta }_{13}$, Lightest neutrino Mass and neutrinoless double beta decay $0\nu \beta \beta$
• Enhancing the sensitivity to neutrino oscillation parameters using synergy between T2K, NO$\nu$A and JUNO