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The Exact WKB analysis for asymmetric scalar preheating (2203.04497v3)
Published 9 Mar 2022 in hep-th, astro-ph.CO, and hep-ph
Abstract: Using the exact WKB analysis of the higher-order differential equations, we analyze the asymmetry in dynamical particle production of a complex scalar field. The solution requires the Stokes phenomena of the fourth-order differential equation. We found that the interference of different types of the Stokes phenomena causes matter-antimatter asymmetry. We also showed a specific example where asymmetry is forbidden in the exact calculation, but a false asymmetry appears in the perturbative expansion.