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

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Abstract

We investigate the resonant particle production of a scalar field x coupled nonminimally to a spacetime curvature R (ÇRx2) as wellas to an inflaton field <f> (g24>2Xi)- In 'he case of g=£3X 1CT4, the f effect assists g resonance in certain parameter regimes. However, for-£S3X 10~4, g resonance is not enhanced by the £ effect because of the f suppression effect as well as a back reaction effect. If £= -4, the maximal fluctuation of produced x particles is V{Af2)ma.xs=2X 1017 GeV for gelXlCT5, which is larger than the minimally coupled case with g ≈ 1 × 10-3.

Original languageEnglish
Article number063515
JournalPhysical Review D
Volume60
Issue number6
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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