Resonant particle production with non-minimally coupled scalar fields in preheating after inflation

Details Resonant particle production with non-minimally coupled scalar fields in preheating after inflation Resonant particle production with non-minimally coupled scalar fields in preheating after inflation

1999-01-14

arxiv.org/abs/hep-ph/9901306v2

Phys.Rev.D60:063515,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

33pages, 12figures. to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.60.063515

We investigate a resonant particle production of a scalar field $\chi$ coupled non-minimally to a spacetime curvature $R$ ($\xi R \chi^2$) as well as to an inflaton field $\phi$ ($g^2\phi^2\chi^2$). In the case of $g < 3 \times 10^{-4}$, $\xi$ effect assists $g$-resonance in certain parameter regimes. However, for $g > 3 \times 10^{-4}$, $g$-resonance is not enhanced by $\xi$ effect because of $\xi$ suppression effect as well as a back reaction effect. If $\xi \approx -4$, the maximal fluctuation of produced $\chi$-particle is $\sqrt{< \chi^2 >}_{max} \approx 2 \times 10^{17}$ GeV for $g < 1 \times 10^{-5}$, which is larger than the minimally coupled case with $g \approx 1 \times 10^{-3}$.

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