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Non-Perturbative Instabilities as a Solution of the Cosmological Moduli Problem
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abstract
It is widely accepted that moduli in the mass range 10eV - $10^4$GeV which start to oscillate with an amplitude of the order of the Planck scale either jeopardize successful predictions of nucleosynthesis or overclose the Universe. It is shown that the moduli problem can be relaxed by making use of parametric resonance. A new non-perturbative decay channel for moduli oscillations is discussed. This channel becomes effective when the oscillating field results in a net negative mass term for the decay products. This scenario allows for the decay of the moduli much before nucleosynthesis and, therefore, leads to a complete solution of the cosmological moduli problem.
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Cited by 1 Pith paper
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Global Asymptotics, the Swampland Conjectures, and Preheating of String Moduli
Global asymptotic shape, not just local curvature, controls tachyonic self-resonant preheating of string moduli, and stochastic light-tower effects mostly smear existing resonance bands.
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