Speaker
Jai-chan Hwang
(IBS)
Description
We present an enhancement of axion density power spectrum during the QCD phase transition. The axion-radiation coupling together with the self-interaction leads to an enhancement of the power spectrum on horizon scales during the phase transition. We evaluate the axion density power spectrum at the end of the QCD phase transition and show a pronounced enhancement for the hilltop initial conditions.
Author
Jai-chan Hwang
(IBS)