Bounds on EFT's in an expanding Universe

Autor:	González, Mariana Carrillo
Rok vydání:	2023
Předmět:	High Energy Physics - Theory Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
Popis:	We find bounds on the Wilson coefficients of effective field theories (EFTs) living in a Universe undergoing expansion by requiring that its modes do not propagate further than a minimally coupled photon by a resolvable amount. To do so, we compute the spatial shift suffered by the EFT modes at a fixed time slice within the WKB approximation and the regime of validity of the EFT. We analyze the bounds arising on shift-symmetric scalars and curved space generalizations of Galileons. Comment: double-column, 7 pages plus appendices and references, 2 figures; v2 matches the published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2312.07651 Zobrazit plný text záznamu View this record from Arxiv