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Cited by 740

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

New Class of Consistent Scalar-Tensor Theories

Open access
Gleyzes, Jérôme, Langlois, David, Piazza, Federico, Vernizzi, Filippo·2015·Physical Review Letters
DOI 10.1103/physrevlett.114.211101
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Abstract

We introduce a new class of scalar-tensor theories of gravity that extend Horndeski, or "generalized Galileon," models. Despite possessing equations of motion of higher order in derivatives, we show that the true propagating degrees of freedom obey well-behaved second-order equations and are thus free from Ostrogradski instabilities, in contrast to standard lore. Remarkably, the covariant versions of the original Galileon Lagrangians-obtained by direct replacement of derivatives with covariant derivatives-belong to this class of theories. These extensions of Horndeski theories exhibit an uncommon, interesting phenomenology: The scalar degree of freedom affects the speed of sound of matter, even when the latter is minimally coupled to gravity.

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Metadata

Authors
Gleyzes, J., Langlois, D., Piazza, F., & Vernizzi, F.
Venue
Physical Review Letters
Publisher
American Physical Society (APS)
Published
2015-05-27
Volume
114
Issue
21
Pages
211101-211101
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
DOI
10.1103/physrevlett.114.211101
OpenAlex
W1872375445
Cited by
740
References
1
FWCI
53.06
Type
journal article
Language
en
Open access
green

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