Generating the Observed Baryon Asymmetry from the Inflaton Field

Abstract

We propose a mechanism by which the inflaton can generate baryogenesis, by taking the inflaton to be a complex scalar field with a weakly broken global symmetry and present a new version of the Affleck-Dine mechanism. The smallness of the breaking is motivated both by technical naturalness and a requirement for inflation. We study inflation driven by a quadratic potential for simplicity and discuss generalizations to other potentials. We compute the inflationary dynamics and find that a conserved particle number is obtained towards the end of inflation. We then explain in detail the later decay to baryons. We present two promising embeddings in particle physics: (i) using high dimension operators for a gauge singlet; we find this leads to the observed asymmetry for decay controlled by the ~ grand unified theory scale and this is precisely the regime where the effective field theory applies. (ii) using a colored inflaton, which requires small couplings. We also point out two observational consequences: a possible large scale dipole in the baryon density, and a striking prediction of isocurvature fluctuations whose amplitude is found to be just below current limits and potentially detectable in future data.

18 pages (double column format), 4 figures, v2: Some clarifications, more references, updated to resemble version published in PRD

References in corpus (12)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Inflaton Fragmentation and Oscillon Formation in Three Dimensions
• Unified origin of baryons and dark matter
• Inhomogeneous baryogenesis, cosmic antimatter, and dark matter
• Baryogenesis from the Inflaton Field
• Higgs Boson Signatures of MSSM Electroweak Baryogenesis
• Affleck-Dine Baryogenesis and Inflation in Supergravity with Strongly Stabilized Moduli
• Affleck-Dine Baryogenesis, Split Supersymmetry, and Inflation
• Towards the robustness of the Affleck-Dine baryogenesis
• Affleck-Dine Baryogenesis in Effective Supergravity
• Complex Hybrid Inflation and Baryogenesis

Cited by in corpus (47)

• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Search for hidden-sector bosons in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• Rare $B$ Decays as Tests of the Standard Model
• Search for long-lived scalar particles in $B^{+}\to K^{+}\chi ({\mu }^{+}{\mu }^{-})$ decays
• Preheating after Multifield Inflation with Nonminimal Couplings, I: Covariant Formalism and Attractor Behavior
• Preheating after Higgs Inflation: Self-Resonance and Gauge boson production
• End of inflation, oscillons and matter-antimatter asymmetry
• Baryogenesis from Hawking Radiation
• Preheating after multifield inflation with nonminimal couplings, II: Resonance Structure
• Baryogenesis from the Inflaton Field
• Increasing Temperature toward the Completion of Reheating
• Quintessential Affleck-Dine baryogenesis with non-minimal couplings
• Affleck-Dine inflation
• Affleck-Dine Leptogenesis from Higgs Inflation
• The charged inflaton and its gauge fields: preheating and initial conditions for reheating
• Inflation, Symmetry, and B-Modes
• Type II Seesaw Leptogenesis
• A Theory of Self-Resonance After Inflation, Part 1: Adiabatic and Isocurvature Goldstone Modes
• Affleck-Dine Baryogenesis with Observable Neutron-Anti-Neutron Oscillation
• A Minimal Approach to Baryogenesis via Affleck-Dine and Inflaton Mass Terms
• Lectures on Reheating after Inflation
• Inflaton as the Affleck-Dine Baryogenesis Field in Hilltop Supernatural Inflation
• Inflatonic baryogenesis with large tensor mode
• Affleck-Dine baryogenesis just after inflation
• A Density Spike on Astrophysical Scales from an N-Field Waterfall Transition
• Affleck-Dine inflation in supergravity
• A Theory of Self-Resonance After Inflation, Part 2: Quantum Mechanics and Particle-Antiparticle Asymmetry
• Lepton Flavour Violation Tests of Type II Seesaw Leptogenesis
• Electroweak Asymmetric Early Universe via a Scalar Condensate
• Affleck-Dine Cogenesis of Baryon and Dark Matter
• Variable Inflaton Equation of State and Reheating
• Inflation Driven by Unification Energy
• Neutrino Mass from Affleck-Dine Leptogenesis and WIMP Dark Matter
• Freeze-In of radiative keV-scale neutrino dark matter from a new $\text{U}(1{)}_{\text{B-L}}$
• Stochastic Baryogenesis
• Baryogenesis via Hawking-like Radiation in the FRW Space-time
• Baryon Asymmetries in the Natural Inflation Model
• Leptogenesis via Inflaton Mass Terms in Non-Minimally Coupled Inflation
• Particle Asymmetries from Quantum Statistics
• On Baryogenesis from a Complex Inflaton
• Affleck-Dine leptogenesis and its backreaction to inflaton dynamics
• Probing baryogenesis with gravitational waves
• Unified Origin of Curvature Perturbation and Baryon Asymmetry of the Universe
• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
• A Unified Model for Inflation, pseudo-Goldstone Dark Matter, Neutrino Mass and Baryogenesis
• Particle-antiparticle oscillation modes crossing horizon: baryogenesis and dark-matter waves