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arXiv · 2203.04497

The Exact WKB analysis for asymmetric scalar preheating

Seishi Enomoto·Tomohiro Matsuda
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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.

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Seishi Enomoto, Tomohiro Matsuda. 2022-03-09. The Exact WKB analysis for asymmetric scalar preheating. https://doi.org/10.1007/jhep01(2023)088

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