Hidden simplicity of the gravity action
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics
We derive new representations of the Einstein-Hilbert action in which graviton perturbation theory is immensely simplified. To accomplish this, we recast the Einstein-Hilbert action as a theory of purely cubic interactions among gravitons and a single auxiliary field. The corresponding equations of motion are the Einstein field equations rewritten as two coupled first-order differential equations. Since all Feynman diagrams are cubic, we are able to derive new off-shell recursion relations for tree-level graviton scattering amplitudes. With a judicious choice of gauge fixing, we then construct an especially compact form for the Einstein-Hilbert action in which all graviton interactions are simply proportional to the graviton kinetic term. Our results apply to graviton perturbations about an arbitrary curved background spacetime.
- Research Organization:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- Grant/Contract Number:
- SC0010255; DGE-1144469
- OSTI ID:
- 1424591
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 9; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Type D spacetimes and the Weyl double copy
|
journal | February 2019 |
The Kerr-Schild double copy in curved spacetime | 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 |
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