Reheating-era leptogenesis

Abstract

We propose a novel leptogenesis scenario at the reheating era. Our setup is minimal in the sense that, in addition to the standard model Lagrangian, we only consider an inflaton and higher dimensional operators. The lepton number asymmetry is produced not by the decay of a heavy particle, but by the scattering between the standard model particles. After the decay of an inflaton, the model is described within the standard model with higher dimensional operators. The Sakharov's three conditions are satisfied by the following way. The violation of the lepton number is realized by the dimension-5 operator. The complex phase comes from the dimension-6 four lepton operator. The universe is out of equilibrium before the reheating is completed. It is found that the successful baryogenesis is realized for the wide range of parameters, the inflaton mass and reheating temperature, depending on the cutoff scale. Since we only rely on the effective Lagrangian, our scenario can be applicable to all mechanisms to generate neutrino Majorana masses.

5 pages, 3 figures; published version(v2)

References in corpus (9)

• The Standard Model Higgs boson as the inflaton
• Higgs inflation at the critical point
• Higgs inflation still alive
• Higgs inflation from Standard Model criticality
• Particle-antiparticle asymmetries from annihilations
• Evidence of the Big Fix
• The role of CP violating scatterings in baryogenesis - case study of the neutron portal
• Topological Higgs inflation: The origin of the Standard Model criticality
• Weak Scale From the Maximum Entropy Principle

Cited by in corpus (14)

• Energy Spectrum of Thermalizing High Energy Decay Products in the Early Universe
• Cascades of high-energy SM particles in the primordial thermal plasma
• Leptogenesis via Neutrino Oscillation Magic
• Leptogenesis in Cosmological Relaxation with Particle Production
• Resonant leptogenesis in (2,2) inverse see-saw realisation
• Throwing away antimatter via neutrino oscillations during the reheating era
• Searches for heavy neutrinos at multi-TeV muon collider : a resonant leptogenesis perspective
• CMB imprints of high scale non-thermal leptogenesis
• Baryogenesis in false vacuum
• Non-thermal WIMP baryogenesis
• The reheating era leptogenesis in models with seesaw mechanism
• Dirac leptogenesis from asymmetry wash-in via scatterings
• Leptogenesis via Varying Weinberg Operator: the Closed-Time-Path Approach
• Dirac leptogenesis via scatterings