Phase transition and monopole production in supergravity inflation

Kohei Kamada, Kazunori Nakayama, Jun'Ichi Yokoyama

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In F-term supergravity inflation models, scalar fields other than the inflaton generically receive a Hubble-induced mass, which may restore gauge symmetries during inflation and phase transitions may occur during or after inflation as the Hubble parameter decreases. We study monopole (and domain wall) production associated with such a phase transition in chaotic inflation in supergravity and obtain a severe constraint on the symmetry breaking scale which is related with the tensor-to-scalar ratio. Depending on model parameters, it is possible that monopoles are sufficiently diluted to be free from current constraints but still observable by planned experiments.

Original languageEnglish
Article number043503
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number4
Publication statusPublished - 2012 Feb 3


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