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arXiv · 1507.00119

Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations

Keisuke Harigaya·Masahiro Ibe·Masahiro Kawasaki·Tsutomu T. Yanagida
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Abstract

The Peccei-Quinn mechanism suffers from the problem of the isocurvature perturbations. The isocurvature perturbations are suppressed if the Peccei-Quinn breaking scale is large during inflation. The oscillation of the Peccei-Quinn breaking field after inflation, however, leads to the formation of domain walls due to the parametric resonance effect. In this paper, we discuss the evolution of the Peccei-Quinn breaking field after inflation in detail, and propose a model where the parametric resonance is ineffective and hence domain walls are not formed. We also discuss consistency of our model with supersymmetric theory.

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Keisuke Harigaya, Masahiro Ibe, Masahiro Kawasaki, Tsutomu T. Yanagida. 2015-07-01. Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations. https://doi.org/10.1088/1475-7516%2F2015%2F11%2F003

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