Observable gravitational waves from hyperkination in Palatini gravity and beyond
Abstract We consider cosmology with an inflaton scalar field with an additional quartic kinetic term. Such a theory can be motivated by Palatini $$R+R^2$$ R + R 2 modified gravity. Assuming a runaway inflaton potential, we take the Universe to become dominated by the kinetic energy density of the sc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-12-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-12332-x |