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High Energy Physics - Theory

arXiv:1805.12010 (hep-th)
[Submitted on 30 May 2018 (v1), last revised 27 Feb 2019 (this version, v2)]

Title:A new scalar-tensor realization of Hořava-Lifshitz gravity

Authors:Javier Chagoya, Gianmassimo Tasinato
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Abstract:We discuss a new covariant scalar-tensor system aimed to realise Hořava proposal for a power-counting renormalizable theory of gravity, with the special feature of not propagating scalar degrees of freedom in an appropriate gauge. The theory is characterized by a new symmetry acting on the metric, that can protect the particular form of its interactions. The set-up spontaneously breaks Lorentz symmetry by means of a time-like scalar field profile. By selecting a unitary gauge for the scalar, we show that this theory describes the dynamics of a spin two degree of freedom, whose equations of motion contain two time derivatives and up to six spatial derivatives. We analytically determine asymptotically flat, spherically symmetric configurations, showing that there exists a branch of solutions physically equivalent to spherically symmetric configurations in General Relativity, also in the presence of matter fields.
Comments: Added sections and several improvements, version accepted for publication. 23 pages, 1 figure
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
Cite as: arXiv:1805.12010 [hep-th]
  (or arXiv:1805.12010v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1805.12010
Related DOI: https://doi.org/10.1088/1361-6382/ab0a4b

Submission history

From: Javier Chagoya [view email]
[v1] Wed, 30 May 2018 14:46:34 UTC (128 KB)
[v2] Wed, 27 Feb 2019 17:09:35 UTC (136 KB)
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