Classical decay of inflaton

Details Classical decay of inflaton Classical decay of inflaton

1996-03-22

arxiv.org/abs/hep-ph/9603378v2

Phys.Rev.Lett.77:219-222,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures, LaTeX. A misprint in the in-line formula after eq.(6) is corrected; the remark on renormalization is impr

Scientific paper

10.1103/PhysRevLett.77.219

We present the first fully non-linear calculation of inflaton decay. We map inflaton decay onto an equivalent classical problem and solve the latter numerically. In the $\lambda\phi^4$ model, we find that parametric resonance develops slower and ends at smaller values of fluctuating fields, as compared to estimates existing in literature. We also observe a number of qualitatively new phenomena, including a stage of semiclassical thermalization, during which the decay of inflaton is essentially as effective as during the resonance stage.

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