TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.12.005
TI  - Axions in the early universe
PY  - 2023/07/03
UR  - https://www.scipost.org/SciPostPhysProc.12.005
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 12
SP  - 005
A1  - D'Eramo, Francesco
AB  - The Peccei-Quinn solution to the strong CP problem provides a motivated framework rich in cosmological consequence. Thermal axion production is unavoidable if there is a thermal bath at early times. Scattering and decay processes of bath particles can dump relativistic axions in the primordial plasma, and they can leave observable signatures in cosmological observables probing both the early and the late universe if produced with a significant abundance. We present recent and significant improvements for the calculation of the axion production rate for different scenarios and apply these results to predict the abundance of produced axions. Finally, we provide updated cosmological bounds on the QCD axion mass.
ER  -

@Article{10.21468/SciPostPhysProc.12.005,
	title={{Axions in the early universe}},
	author={Francesco D'Eramo},
	journal={SciPost Phys. Proc.},
	pages={005},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.12.005},
	url={https://scipost.org/10.21468/SciPostPhysProc.12.005},
}