Constraints on the chaotic inflationary scenario with a nonminimally coupled “inflaton” field from the cosmic microwave background radiation anisotropy

Eiichiro Komatsu, Toshifumi Futamase

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

We investigate the possibility to restrict the chaotic inflationary scenario with the large nonminimally coupled inflaton field [Formula Presented] considered by Fakir and Unruh by means of the observed cosmic microwave background radiation (CMBR) anisotropy. This model is characterized by the condition [Formula Presented] and [Formula Presented] where [Formula Presented] is the nonminimal coupling constant. We calculate the contributions of the long wavelength gravitational waves generated in the inflationary period to the CMBR anisotropy quadrupole moment. We obtain the constraint [Formula Presented] where [Formula Presented] is the self-coupling and [Formula Presented] means the initial value of [Formula Presented] Combining this with the previously obtained constraint [Formula Presented] we conclude that the initial value has to be [Formula Presented] If the self-coupling has reasonable values of order [Formula Presented] then [Formula Presented] and [Formula Presented] where [Formula Presented] is the Planck mass.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume58
Issue number2
DOIs
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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