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A Stepping Stone Solution to the QCD Axion Isocurvature Problem

Lyu, Kun-Feng et al.
arXiv (All) · Papers
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cosmology-and-nongalactic-astrophysicshigh-energy-physics-phenomenology
We propose a ''stepping stone'' realization of the varying Peccei Quinn (PQ) scale solution to the QCD axion isocurvature problem. In conventional implementations, suppressing isocurvature during high scale inflation requires a large inflationary PQ scale, while the subsequent evolution toward the m
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