Physics of superheavy dark matter in supergravity

Andrea Addazi, Antonino Marciano, Sergei V. Ketov, Maxim Yu Khlopov

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


New trends in inflationary model building and dark matter production in supergravity are considered. Starobinsky inflation is embedded into (Formula presented.) supergravity, avoiding instability problems, when the inflaton belongs to a vector superfield associated with a (Formula presented.) gauge symmetry, instead of a chiral superfield. This gauge symmetry can be spontaneously broken by the super-Higgs mechanism resulting in a massive vector supermultiplet including the (real scalar) inflaton field. Both supersymmetry (SUSY) and the R-symmetry can also be spontaneously broken by the Polonyi mechanism at high scales close to the inflationary scale. In this case, Polonyi particles and gravitinos become superheavy, and can be copiously produced during inflation by the Schwinger mechanism sourced by the universe expansion. The Polonyi mass slightly exceeds twice the gravitino mass, so that Polonyi particles are unstable and decay into gravitinos. Considering the mechanisms of superheavy gravitino production, we find that the right amount of cold dark matter composed of gravitinos can be achieved. In our scenario, the parameter space of the inflaton potential is directly related to the dark matter one, providing a new unifying framework of inflation and dark matter genesis. A multi-superfield extension of the supergravity framework with a single (inflaton) superfield can result in a formation of primordial nonlinear structures like mini- and stellar-mass black holes, primordial nongaussianity, and the running spectral index of density fluctuations. This framework can be embedded into the SUSY GUTs inspired by heterotic string compactifications on Calabi–Yau three-folds, thus unifying particle physics with quantum gravity.

Original languageEnglish
Article number1841011
JournalInternational Journal of Modern Physics D
Issue number6
Publication statusPublished - 1 Apr 2018
Externally publishedYes


  • Dark matter
  • inflation
  • reheating
  • supergravity

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

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