Constraining Palatini-Horndeski theory with gravitational waves after GW170817
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866913237298053120 |
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| author | Dong, Yu-Qi Liu, Yu-Qiang Liu, Yu-Xiao |
| author_facet | Dong, Yu-Qi Liu, Yu-Qiang Liu, Yu-Xiao |
| contents | 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 $S = \int d^4x \sqrt{-g} \big[K(ϕ,X)-G_{3}(ϕ,X){\tilde{\Box}}ϕ+G_{4}(ϕ)\tilde{R}\big]$ is left as the possible action in Palatini-Horndeski theory. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2211_12056 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Constraining Palatini-Horndeski theory with gravitational waves after GW170817 Dong, Yu-Qi Liu, Yu-Qiang Liu, Yu-Xiao General Relativity and Quantum Cosmology High Energy Physics - Theory 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 $S = \int d^4x \sqrt{-g} \big[K(ϕ,X)-G_{3}(ϕ,X){\tilde{\Box}}ϕ+G_{4}(ϕ)\tilde{R}\big]$ is left as the possible action in Palatini-Horndeski theory. |
| title | Constraining Palatini-Horndeski theory with gravitational waves after GW170817 |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2211.12056 |