CP Violation and Lightest Neutrino Mass Effects in Thermal Leptogenesis

Abstract

Effects of the lightest neutrino mass in "flavoured" leptogenesis when the CP-violation necessary for the generation of the baryon asymmetry of the Universe is due exclusively to the Dirac and/or Majorana phases in the neutrino mixing matrix $U$ are discussed. The type I see-saw scenario with three heavy right-handed Majorana neutrinos having hierarchical spectrum is considered. The "orthogonal" parametrisation of the matrix of neutrino Yukawa couplings, which involves a complex orthogonal matrix $R$, is employed. Results for light neutrino mass spectrum with normal and inverted ordering (hierarchy) are reviewed.

arXiv commentTo appear in the proceedings of DISCRETE'08, Symposium on Prospects in the Physics of Discrete Symmetries, IFIC, Valencia, Spain, 11-16 December 2008

References in corpus (20)

• Oscillating neutrinos and mu --> e, gamma
• Baryogenesis through leptogenesis
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• Flavour Matters in Leptogenesis
• Neutrino Mass Operator Renormalization Revisited
• Flavor effects on leptogenesis predictions
• General RG Equations for Physical Neutrino Parameters and their Phenomenological Implications
• On the Connection of Leptogenesis with Low Energy CP Violation and LFV Charged Lepton Decays
• Flavour-Dependent Leptogenesis with Sequential Dominance
• A new bridge between leptonic CP violation and leptogenesis
• The See-Saw Mechanism, Neutrino Yukawa Couplings, LFV Decays l_i to l_j + gamma and Leptogenesis
• Majorana Neutrinos, Neutrino Mass Spectrum, CP-Violation and Neutrinoless Double Beta-Decay: II. Mixing of Four Neutrinos
• Majorana CP-Violating Phases, RG Running of Neutrino Mixing Parameters and Charged Lepton Flavour Violating Decays
• The Interplay Between the "Low" and "High" Energy CP-Violation in Leptogenesis
• A Case of Subdominant/Suppressed "High Energy" Contribution to the Baryon Asymmetry of the Universe in Flavoured Leptogenesis
• Towards Complete Neutrino Mixing Matrix and CP-Violation
• Baryogenesis via Lepton Number Violation and Family Replicated Gauge Group
• Exploring the neutrino mass matrix at M_R scale
• Effects of Lightest Neutrino Mass in Leptogenesis