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Title: Effective field theory of broken spatial diffeomorphisms

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2]
  1. Kyoto Univ., Kyoto (Japan); The Univ. of Tokyo, Chiba (Japan)
  2. Univ. of Texas, Austin, TX (United States); National Taiwan Univ., Taipei (Taiwan)

We study the low energy effective theory describing gravity with broken spatial diffeomorphism invariance. In the unitary gauge, the Goldstone bosons associated with broken diffeomorphisms are eaten and the graviton becomes a massive spin-2 particle with 5 well-behaved degrees of freedom. In this gauge, the most general theory is built with the lowest dimension operators invariant under only temporal diffeomorphisms. Imposing the additional shift and SO(3) internal symmetries, we analyze the perturbations on a FRW background. At linear perturbation level, the observables of this theory are characterized by five parameters, including the usual cosmological parameters and one additional coupling constant for the symmetry-breaking scalars. In the de Sitter and Minkowski limit, the three Goldstone bosons are supermassive and can be integrated out, leaving two massive tensor modes as the only propagating degrees of freedom. In conclusion, we discuss several examples relevant to theories of massive gravity.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002008
OSTI ID:
1326978
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 3; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (12)

Distinctive signatures of space-time diffeomorphism breaking in EFT of inflation journal March 2016
Massive gravity and the suppression of anisotropies and gravitational waves in a matter-dominated contracting universe journal January 2018
Anisotropic tensor power spectrum at interferometer scales induced by tensor squeezed non-Gaussianity journal February 2018
Probing the inflationary particle content: extra spin-2 field journal August 2018
Probing non-Gaussian stochastic gravitational wave backgrounds with LISA journal November 2018
A new mechanism to enhance primordial tensor fluctuations in single field inflation journal December 2018
Squeezed tensor non-Gaussianity in non-attractor inflation journal September 2019
Probing non-Gaussian stochastic gravitational wave backgrounds with LISA text January 2018
Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA text January 2018
Distinctive signatures of space-time diffeomorphism breaking in EFT of inflation text January 2015
A new mechanism to enhance primordial tensor fluctuations in single field inflation text January 2018
Squeezed tensor non-Gaussianity in non-attractor inflation text January 2019

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