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Twofold symmetries of the pure gravity action

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics; DOE/OSTI
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics

Here, we recast the action of pure gravity into a form that is invariant under a twofold Lorentz symmetry. To derive this representation, we construct a general parameterization of all theories equivalent to the Einstein-Hilbert action up to a local field redefinition and gauge fixing. We then exploit this freedom to eliminate all interactions except those exhibiting two sets of independently contracted Lorentz indices. The resulting action is local, remarkably simple, and naturally expressed in a field basis analogous to the exponential parameterization of the nonlinear sigma model. The space of twofold Lorentz invariant field redefinitions then generates an infinite class of equivalent representations. By construction, all off-shell Feynman diagrams are twofold Lorentz invariant while all on-shell tree amplitudes are automatically twofold gauge invariant. We extend our results to curved spacetime and calculate the analogue of the Einstein equations. Finally, while these twofold invariances are hidden in the canonical approach of graviton perturbation theory, they are naturally expected given the double copy relations for scattering amplitudes in gauge theory and gravity.

Research Organization:
California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
SC0010255
OSTI ID:
1360789
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 1 Vol. 2017; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (30)

The classical double copy of a point charge journal February 2020
Inelastic black hole scattering from charged scalar amplitudes journal March 2018
Pions as gluons in higher dimensions journal April 2018
The classical double copy in three spacetime dimensions journal July 2019
Hidden simplicity of the gravity action journal September 2017
Kerr-Schild double field theory and classical double copy journal October 2018
Gravitational radiation from color-kinematics duality journal November 2018
The Kerr-Schild double copy in curved spacetime journal December 2017
The double copy: gravity from gluons journal January 2018
Scattering on plane waves and the double copy journal December 2017
Scattering of two spinning black holes in post-Minkowskian gravity, to all orders in spin, and effective-one-body mappings journal March 2018
Type D spacetimes and the Weyl double copy journal February 2019
Teleparallel Palatini theories journal August 2018
Classical gluon and graviton radiation from the bi-adjoint scalar double copy journal September 2017
Soft collinear effective theory for gravity journal March 2018
Gravitational radiation from the classical spinning double copy journal May 2018
Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes journal May 2017
Hidden Simplicity of the Gravity Action text January 2017
Scattering on plane waves and the double copy text January 2017
The double copy: gravity from gluons text January 2017
Pions as Gluons in Higher Dimensions text January 2017
Scattering of two spinning black holes in post-Minkowskian gravity, to all orders in spin, and effective-one-body mappings text January 2017
The Kerr-Schild double copy in curved spacetime text January 2017
Soft collinear effective theory for gravity text January 2017
Inelastic Black Hole Scattering from Charged Scalar Amplitudes text January 2017
Gravitational radiation from the classical spinning double copy text January 2018
Gravitational Radiation from Color-Kinematics Duality text January 2018
Type D Spacetimes and the Weyl Double Copy text January 2018
The classical double copy in three spacetime dimensions preprint January 2019
The Classical Double Copy of a Point Charge text January 2019

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