Disformal transformations on the CMB
In this work we study the role of disformal transformation on cosmological backgrounds and its relation to the speed of sound for tensor modes. A speed different from one for tensor modes can arise in several contexts, such as Galileons theories or massive gravity, nevertheless the speed is very con...
| Main Authors: | , , |
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| Format: | Article |
| Published: |
IOPScience
2016
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| Online Access: | https://eprints.nottingham.ac.uk/39508/ |