Octant Degeneracy and Quadrant of Leptonic CPV Phase at Long Baseline ν Experiments and Baryogenesis. (29th September 2016)

• Record Type: Journal Article
• Authors: Bora, Kalpana; Ghosh, Gayatri; Dutta, Debajyoti
• Other Names: Samanta Abhijit Academic Editor.
• Is Part Of: Advances in high energy physics. Volume 2016(2016)
• Publication Date: 2016-09-29
• Subjects: Particles (Nuclear physics) -- Periodicals; Particles (Nuclear physics); Periodicals; 539.76
• DOI: 10.1155/2016/9496758
• Languages: English
• ISSNs: 1687-7357

Abstract

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 angleθ 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 phaseδ CP can be predicted in this context. With respect to the latest global fit data of neutrino mixing angles, we predict the values ofδ CP for different cases. In this context we present favoured values ofδ CP (δ CP range at ≥2 σ ) constrained by the latest updated BAU range and also confront our predictions ofδ CP with an up-to-date global analysis of neutrino oscillation data. We find that some region of the favouredδ CP parameter space lies within the best fit values aroundδ CP ≃ 1.3 π – 1.4 π . A detailed analytic and numerical study of baryogenesis through leptogenesis is performed in this framework within the nonsupersymmetric SO( 10 ) models.