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- W2018800900 abstract "We study the domain wall problem of an axion in chaotic inflation models. We show that the production of domain walls does not occurs if the Peccei-Quinn scalar has a flat potential and its breaking $F_{a}$ is larger than $sim 10^{15}$GeV. We find that too large isocurvature fluctuations are produced for such high $F_{a}$. In order for those isocurvature fluctuations to be consistent with observations of the large scale structure of the universe, the self-coupling constant $g$ and the breaking scale of the Peccei-Quinn scalar should be $g simeq (1-2.8)times 10^{-13}$ and $F_{a} simeq (0.6-1.5)times 10^{15}$GeV, respectively. In particular the value of self-coupling constant is almost the same as that required for a chaotic inflation, which strongly suggests that the Peccei-Quinn scalar itself is an inflaton." @default.
- W2018800900 created "2016-06-24" @default.
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- W2018800900 date "1997-12-01" @default.
- W2018800900 modified "2023-10-03" @default.
- W2018800900 title "Domain wall problem of axion and isocurvature fluctuations in chaotic inflation models" @default.
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- W2018800900 doi "https://doi.org/10.1016/s0370-2693(97)01270-7" @default.
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