Particle production in the oscillating inflation model

Details Particle production in the oscillating inflation model Particle production in the oscillating inflation model

2000-03-26

arxiv.org/abs/hep-ph/0003252v1

Phys.Rev.D61:083516,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 14 figures

Scientific paper

10.1103/PhysRevD.61.083516

We investigate the particle production of a scalar field $\chi$ coupled to an inflaton field $\phi$ ($g^2\phi^2\chi^2/2$) in the {\it oscillating inflation} model, which was recently proposed by Damour and Mukhanov. Although the fluctuation of the $\phi$ field can be effectively enhanced during a stage of the oscillating inflation, the maximum fluctuation is suppressed as the critical value $\phi_c$ which indicates the scale of the core part of the inflaton potential decreases, in taking into account the back reaction effect of created particles. As for the $\chi$ particle production, we find that larger values of the coupling constant $g$ are required to lead to an efficient parametric resonance with the decrease of $\phi_c$, because an effective mass of inflaton around the minimum of its potential becomes larger. However, it is possible to generate the superheavy $\chi$ particle whose mass is greater than $10^{14}$ GeV, which would result in an important consequence for the GUT baryogenesis.

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