paper

Classical decay of inflaton

arXiv:hep-ph/9603378 · doi:10.1103/PhysRevLett.77.219

Abstract

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 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.

10 pages, 3 figures, LaTeX. A misprint in the in-line formula after eq.(6) is corrected; the remark on renormalization is improved; factor 1/24 in the definition of is replaced by the correct 1/12

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