TY - JOUR
T1 - Resonant particle production with nomninimally coupled scalar fields in preheating after inflation
AU - Tsujikawa, Shinji
N1 - Copyright:
Copyright 2006 Elsevier B.V., All rights reserved.
PY - 1999
Y1 - 1999
N2 - 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 (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.
AB - 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 (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.
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M3 - Article
AN - SCOPUS:33751322480
VL - 60
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 6
M1 - 063515
ER -