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arXiv · 2305.18524

Ultraviolet Sensitivity of Peccei-Quinn Inflation

Davide Dal Cin·Takeshi Kobayashi
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Abstract

The radial direction of the Peccei--Quinn field can drive cosmic inflation, given a non-minimal coupling to gravity. This scenario has been considered to simultaneously explain inflation, the strong $CP$ problem, and dark matter. We argue that Peccei--Quinn inflation is extremely sensitive to higher-dimensional operators. Further combining with the discussion on the axion quality required for solving the strong $CP$ problem, we examine the validity of this scenario. We also show that after Peccei--Quinn inflation, resonant amplifications of the field fluctuation is inevitably triggered.

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Davide Dal Cin, Takeshi Kobayashi. 2023-05-29. Ultraviolet Sensitivity of Peccei-Quinn Inflation. https://doi.org/10.1103/physrevd.108.063530

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