Coupled fields in external background with application to non-thermal production of gravitinos

Hans Peter Nilles, Marco Peloso, Lorenzo Sorbo

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

We provide the formalism for the quantization of systems of coupled bosonic and fermionic fields in a time dependent classical background. The occupation numbers of the particle eigenstates can be clearly defined and computed, through a generalization of the standard procedure valid for a single field in which Bogolyubov coefficients are employed. We apply our formalism to the problem of non-thermal gravitino production in a two-fields model where supersymmetry is broken gravitationally in the vacuum. Our explicit calculations show that this production is strongly suppressed in the model considered, due to the weak coupling between the sector which drives inflation and the one responsible for supersymmetry breakdown.

Original languageEnglish (US)
Pages (from-to)XIV-42
JournalJournal of High Energy Physics
Volume5
Issue number4
DOIs
StatePublished - 2001

Keywords

  • Cosmology of theories beyond the SM
  • Physics of the early universe

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