Resonant particle production with nonminimally coupled scalar fields in preheating after inflation

Shinji Tsujikawa, Keiichi Maeda, Takashi Torii

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

We investigate the resonant particle production of a scalar field χ coupled nonminimally to a spacetime curvature R (ξRχ2) as well as to an inflaton field φ(g2φ2χ2). In the case of g≲3×10-4, the ξ effect assists g resonance in certain parameter regimes. However, for g≳3×10-4, g resonance is not enhanced by the ξ effect because of the ξ suppression effect as well as a back reaction effect. If ξ≈-4, the maximal fluctuation of produced χ particles is √〈χ2max≈2×1017 GeV for g≲1×10-5, which is larger than the minimally coupled case with g≈1×10-3.

Original languageEnglish
Pages (from-to)1-19
Number of pages19
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume60
Issue number6
Publication statusPublished - 1999 Sep 15

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particle production
scalars
heating
curvature
retarding

ASJC Scopus subject areas

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

Cite this

Resonant particle production with nonminimally coupled scalar fields in preheating after inflation. / Tsujikawa, Shinji; Maeda, Keiichi; Torii, Takashi.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 60, No. 6, 15.09.1999, p. 1-19.

Research output: Contribution to journalArticle

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