Explosive Axion Production from Saxion
Yohei Ema, Kazunori Nakayama
TL;DR
This paper investigates how saxion dynamics in a supersymmetric axion model can lead to efficient axion production, potential gravitational wave signals, and cosmological implications.
Contribution
It provides a detailed analysis of saxion-induced axion production, highlighting the spike-like behavior of the effective axion mass and exploring related cosmological effects.
Findings
Axion production is highly efficient when saxion oscillation amplitude exceeds the Peccei-Quinn scale.
The study predicts possible gravitational wave signals from non-linear saxion and axion dynamics.
Cosmological consequences of axino production are also discussed.
Abstract
The dynamics of saxion in a supersymmetric axion model and its effect on the axion production is studied in detail. We find that the axion production is very efficient when the saxion oscillation amplitude is much larger than the Peccei-Quinn scale, due to a spike-like behavior of the effective axion mass. We also consider the axino production and several cosmological consequences. The possibility of detection of gravitational waves from the non-linear dynamics of the saxion and axion is discussed.
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