Leptogenesis in GeV scale seesaw models

Abstract

We revisit the production of leptonic asymmetries in minimal extensions of the Standard Model that can explain neutrino masses, involving extra singlets with Majorana masses in the GeV scale. We study the quantum kinetic equations both analytically, via a perturbative expansion up to third order in the mixing angles, and numerically. The analytical solution allows us to identify the relevant CP invariants, and simplifies the exploration of the parameter space. We find that sizeable lepton asymmetries are compatible with non-degenerate neutrino masses and measurable active-sterile mixings.

34 pages, 13 figures. Several typos corrected

References in corpus (8)

• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• Updated fit to three neutrino mixing: status of leptonic CP violation
• Baryon Asymmetry of the Universe in the NuMSM
• Pseudo-Dirac Neutrinos in the New Standard Model
• The minimal 3+2 neutrino model versus oscillation anomalies
• Lepton number violation as a key to low-scale leptogenesis
• Rephasing Invariants of Quark and Lepton Mixing Matrices
• $N_{\mathrm{eff}}$ in low-scale seesaw models versus the lightest neutrino mass

Cited by in corpus (4)

• Baryogenesis from L-violating Higgs-doublet decay in the density-matrix formalism
• Initial condition for baryogenesis via neutrino oscillation
• Lepton number symmetry as a way to testable leptogenesis
• Probing the Seesaw Mechanism and Leptogenesis with the International Linear Collider