Generalized disformal invariance of cosmological perturbations with second-order field derivatives
We investigate how the comoving curvature and tensor perturbations are transformed under the generalized disformal transformation with the second-order covariant derivatives of the scalar field, where the free functions depend on the fundamental elements constructed with the covariant derivatives of...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321001805 |