Constraining Palatini-Horndeski theory with gravitational waves after GW170817

Autor: Dong, Yu-Qi, Liu, Yu-Qiang, Liu, Yu-Xiao
Rok vydání: 2022
Předmět:
Zdroj: Eur.Phys.J.C 83 (2023) 8, 702
Druh dokumentu: Working Paper
DOI: 10.1140/epjc/s10052-023-11861-9
Popis: In this paper, we investigate the possible parameter space of Palatini-Horndeski theory with gravitational waves in a spatially flat Universe. We find that if the theory satisfies the following condition: in any spatially flat cosmological background, the tensor gravitational wave speed is the speed of light $c$, then only $S = \int d^4x \sqrt{-g} \big[K(\phi,X)-G_{3}(\phi,X){\tilde{\Box}}\phi+G_{4}(\phi)\tilde{R}\big]$ is left as the possible action in Palatini-Horndeski theory.
Comment: 23 pages, no figure
Databáze: arXiv
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