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A Dynamical Solution to the Axion Domain Wall Problem

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arxiv 1909.01604 v1 pith:Y4CZ5R4M submitted 2019-09-04 hep-ph

Masahiro Ibe , Shin Kobayashi , Motoo Suzuki , Tsutomu T. Yanagida This is my paper
classification hep-ph
keywords modelsaxioninflationmechanismproblemdomainwallcombinations
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abstract

The domain wall problem and the isocurvature problem restrict possible combinations of axion models and inflation models. In this paper, we considered a new mechanism which solves those problems by dynamics of multiple scalar fields during/after inflation. The mechanism makes axion models with a non-trivial domain wall number compatible with inflation models with a large Hubble parameter, $H_{I} \gg 10^{7\mbox{-}8}\,$GeV. The mechanism also avoids the isocurvature problem. This mechanism increases the freedom of choice of combinations of axion models and inflation models.

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Cited by 1 Pith paper

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  1. Bias with a Timer: Axion Domain Wall Decay and Dark Matter

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A light spectator field first creates and later disables an extra axion potential, letting axion domain walls decay and matching dark matter at larger decay constants.

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