Dark Matter from Starobinsky Supergravity

Abstract

We review our recent results on dark matter from Starobinsky supergravity. In this context, a natural candidate for Cold Dark Matter is the gravitino. On the other hand, assuming the supersymmetry broken at scales much higher than the electroweak scale, gravitinos are super heavy particles. In this case, they may be non-thermally produced during inflation, in turn originated by the scalaron field with Starobinsky's potential.Assuming gravitinos as Lightest supersymmetric particles (LSSP), the non-thermal production naturally accounts for the right amount of cold dark matter. Metastability of the gravitino LSSP leads to observable effects of their decay, putting constraints on the corresponding Unstable or Decaying Dark Matters scenarios. In this model, the gravitino mass is controlled by the inflaton field and it runs with it. This implies that a continuous spectrum of superheavy gravitinos is produced during the slow-roll epoch. Implications in phenomenology, model building in GUT scenarios, intersecting D-branes models and instantons in string theories are discussed.

to appear in Mod.Phys.Lett.A. arXiv admin note: text overlap with arXiv:1612.06417

References in corpus (10)

• Thermal production of gravitinos
• Cosmology with Nilpotent Superfields
• The Minimal Volkov - Akulov - Starobinsky Supergravity
• Embedding (R+R^2)-Inflation into Supergravity
• Minimal $R+R^2$ Supergravity Models of Inflation Coupled to Matter
• Neutron Majorana mass from exotic instantons
• Dynamical supersymmetry breaking from unoriented D-brane instantons
• 'Exotic vector-like pair' of color-triplet scalars
• Dark Matter and Inflation in $R+\zeta R^2$ Supergravity
• Cosmological Probes for Supersymmetry

Cited by in corpus (10)

• Superheavy scalar dark matter from gravitational particle production in $\alpha$-attractor models of inflation
• Catastrophic Production of Slow Gravitinos
• The Inflaton Portal to a Highly decoupled EeV Dark Matter Particle
• $\mu$-hybrid Inflation, Gravitino Dark Matter and Stochastic Gravitational Wave Background from Cosmic Strings
• Gravitino and Polonyi production in supergravity
• A $U(1{)}_R$ inspired inflation model in no-scale Supergravity
• Probing the BSM physics with CMB precision cosmology: an application to supersymmetry
• Particle Dark Matter Candidates
• Constraints on superheavy dark matter decaying into $h\nu$, $Z\nu$ and $W\ell$ -- Benchmark example within an extended seesaw framework
• Freeze-in and freeze-out production of Higgs portal Majorana fermionic dark matter during and after reheating