Sleptogenesis

Abstract

We propose that the observed baryon asymmetry of the Universe can naturally arise from a net asymmetry generated in the sleptonic sector at fairly low reheat temperatures. The best candidate is indeed the right-handed sneutrino. The initial asymmetry in the sneutrino sector can be produced from the decay of the inflaton, and is subsequently transferred into the Standard Model (s)lepton doublet via the decay of the sneutrino. The active sphalerons then reprocess the leptonic asymmetry into the baryonic asymmetry. The marked feature of this scenario is that the lepton asymmetry is decoupled from the neutrino Yukawa sector. We exhibit that our scenario can be embedded within models which seek the origin of a tiny mass for neutrinos.

7 revtex pages, 2 figures (uses axodraw). Minor changes for better clarification and updated references. Final version to appear in Phys. Rev. D

References in corpus (37)

• CP violating decays in leptogenesis scenarios
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• Big Bang nucleosynthesis and physics beyond the Standard Model
• Baryogenesis from a Lepton Asymmetric Universe
• Primordial Nucleosynthesis: Theory and Observations
• Cosmic Microwave Background, Matter-Antimatter Asymmetry and Neutrino Masses
• CP Asymmetry in Majorana Neutrino Decays
• Production of Massive Fermions at Preheating and Leptogenesis
• Leptogenesis in Inflaton Decay
• Heavy Majorana Neutrinos and Baryogenesis
• Gravitino Production After Inflation
• Leptogenesis from $\tilde{N}$-dominated early universe
• Leptogenesis in Inflationary Universe
• Baryon Asymmetry, Neutrino Mixing and Supersymmetric SO(10) Unification
• Thermal and Non-Thermal Production of Gravitinos in the Early Universe
• Leptogenesis in Supersymmetric Standard Model with Right-handed Neutrino
• Non-Thermal Production of Dangerous Relics in the Early Universe
• Leptogenesis at the TeV scale
• Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector
• Inflation, Neutrino Baryogenesis, and (S)Neutrino-Induced Baryogenesis
• On the Thermal Regeneration Rate for Light Gravitinos in the Early Universe
• Coupled fields in external background with application to nonthermal production of gravitinos
• Thermalisation after inflation
• Production of spin 3/2 particles from vacuum fluctuations
• Thermalization after inflation and production of massive stable particles
• Matter Antimatter Asymmetry and Neutrino Properties
• Inflatonic Solitons In Running Mass Inflation
• Reheating as a surface effect
• The Inflatino Problem in Supergravity Inflationary Models
• Is nonperturbative inflatino production during preheating a real threat to cosmology?
• Lepton Flavor Violation and the Origin of the Seesaw Mechanism
• Gravitino production in hybrid inflationary models
• Non-thermal leptogenesis with almost degenerate superheavy neutrinos
• Leptogenesis and rescattering in supersymmetric models
• Affleck-Dine leptogenesis via right-handed sneutrino fields in a supersymmetric hybrid inflation model
• Possible astrophysical signatures of heavy stable neutral relics in supergravity models
• Baryogenesis with Scalar Bilinears

Cited by in corpus (12)

• Resonant Leptogenesis
• Leptogenesis from Supersymmetry Breaking
• Supersymmetric Thermalization and Quasi-Thermal Universe: Consequences for Gravitinos and Leptogenesis
• Low-scale standard supersymmetric leptogenesis
• New Ways to Soft Leptogenesis
• Reheating in supersymmetric high scale inflation
• Leptogenesis from a sneutrino condensate revisited
• A model for fluctuating inflaton coupling: (s)neutrino induced adiabatic perturbations and non-thermal leptogenesis
• Gravitino production from reheating in split supersymmetry
• CMB constraints on non-thermal leptogenesis
• Leptogenesis as the source of gravitino dark matter and density perturbations
• Baryon asymmetry and dark matter from soft leptogenesis