Higher-derivative operators and effective field theory for general scalar-tensor theories - INSPIRE

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Higher-derivative operators and effective field theory for general scalar-tensor theories

Adam R. Solomon
(
- Pennsylvania U.
)
,
Mark Trodden
(
- Pennsylvania U.
)

Sep 27, 2017

39 pages

Published in:

JCAP 02 (2018) 031

Published: Feb 16, 2018

e-Print:

1709.09695 [hep-th]

DOI:

10.1088/1475-7516/2018/02/031

View in:

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Abstract: (arXiv)

We discuss the extent to which it is necessary to include higher-derivative operators in the effective field theory of general scalar-tensor theories. We explore the circumstances under which it is correct to restrict to second-order operators only, and demonstrate this using several different techniques, such as reduction of order and explicit field redefinitions. These methods are applied, in particular, to the much-studied Horndeski theories. The goal is to clarify the application of effective field theory techniques in the context of popular cosmological models, and to explicitly demonstrate how and when higher-derivative operators can be cast into lower-derivative forms suitable for numerical solution techniques.

Note:

37+3 pages. v2: version published in JCAP

derivative: high
effective field theory
scalar tensor
numerical calculations
cosmological model
U(1)
gravitation
higher-dimensional

References(53)

Figures(0)

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