Scalaron the mighty: producing dark matter and baryon asymmetry at reheating

Abstract

In R^2-inflation scalaron slow roll is responsible for the inflationary stage, while its oscillations reheat the Universe. We find that the same scalaron decays induced by gravity can also provide the dark matter production and leptogenesis. With R^2-term and three Majorana fermions added to the Standard Model, we arrive at the phenomenologically complete theory capable of simultaneously explaining neutrino oscillations, inflation, reheating, dark matter and baryon asymmetry of the Universe. Besides the seesaw mechanism in neutrino sector, we use only gravity, which solves all the problems by exploiting scalaron.

13 pages; v2: minor corrections; v3: 14 pages, journal version

References in corpus (6)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Disappearing cosmological constant in f(R) gravity
• Leptogenesis
• Constraining f(R) Gravity as a Scalar Tensor Theory
• How to find neutral leptons of the nuMSM?
• Collapse of Small-Scale Density Perturbations during Preheating in Single Field Inflation

Cited by in corpus (36)

• Non-singular exponential gravity: a simple theory for early- and late-time accelerated expansion
• Unifying Holographic Inflation with Holographic Dark Energy: a Covariant Approach
• Modified Gravity Explains Dark Matter?
• Some like it hot: $R^2$ heals Higgs inflation, but does not cool it
• Gravitational shine of dark domain walls
• Inflation, the Hubble Tension and Early Dark Energy: an alternative overview
• Reheating ACTs on Starobinsky and Higgs inflation
• Reheating processes after Starobinsky inflation in old-minimal supergravity
• Cosmology with a light ghost
• Oscillating scalar dissipating in a medium
• Modified theory of gravity and the history of cosmic evolution
• Cosmological acceleration
• No quasi-stable scalaron lump forms after $R^2$ inflation
• Thermodynamics of Evolving Lorentzian Wormholes at Apparent Horizon in $f(R)$ Theory of Gravity
• Non-thermal Production of PNGB Dark Matter and Inflation
• Chasing cosmic inflation: constraints for inflationary models and reheating insights
• Hidden Dark Matter from Starobinsky Inflation
• Variable Inflaton Equation of State and Reheating
• On the Conformal Frames in $f(R)$ Gravity
• Production of gravitational waves during preheating in the Starobinsky inflationary model
• Scalaron production in contracting astrophysical objects
• Instability of the Electroweak Vacuum in Starobinsky Inflation
• Stability of Schwarzshild black holes in quadratic gravity with Weyl curvature domination
• Darkflation -- one scalar to rule them all?
• Bounds from multi-messenger astronomy on the Super Heavy Dark Matter
• Calculations of scalaron decay probabilities
• Relativistic Dynamics of a Charged Particle in an Electroscalar Field
• Superheavy dark matter in $R^2$-cosmology
• Gravitational waves from primordial black hole dominance: The effect of inflaton decay rate
• Strict renormalizability as a paradigm for fundamental physics
• Improved model of large-field inflation with primordial black hole production in Starobinsky-like supergravity
• Sub-Planckian scale and limits for $f(R)$ models
• Simulating first-order phase transition during inflation
• A cross-epoch endpoint-consistency test of a single effective scaling from dark energy to inflation
• Time evolution of the equation of state during perturbative reheating and its impact on the inflationary tensor perturbation spectrum
• The effective Higgs potential and vacuum decay in Starobinsky inflation