Perturbatively including inhomogeneities in axion inflation

Autor:	Domcke, Valerie, Ema, Yohei, Sandner, Stefan
Rok vydání:	2023
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	Axion inflation, i.e. an axion-like inflaton coupled to an Abelian gauge field through a Chern-Simons interaction, comes with a rich and testable phenomenology. This is particularly true in the strong backreaction regime, where the gauge field production heavily impacts the axion dynamics. Lattice simulations have recently demonstrated the importance of accounting for inhomogeneities of the axion field in this regime. We propose a perturbative scheme to account for these inhomogeneities while maintaining high computational efficiency. Our goal is to accurately capture deviations from the homogeneous axion field approximation within the perturbative regime as well as self-consistently determine the onset of the non-perturbative regime. Comment: 21 pages, 7 figures; v2: version accepted in JCAP
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2310.09186 Zobrazit plný text záznamu View this record from Arxiv