AT4 - Massive gravity, Horndeski theory and other "ghost-free" models of modified gravity |
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Speaker |
Iyonaga, Aya |
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Coauthors |
Kobayashi, Tsutomu |
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Extended Cuscuton |
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Abstract |
Many scalar-tensor theories have more than 2 degrees of freedom because of additional scalar fields. However, there is a theory called “cuscuton” whose number of degrees of freedom is only 2 on a cosmological background. We construct more general theories with 2 degrees of freedom from the Horndeski and beyond Horndeski theories. |
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