Christos Charmousis
General second-order scalar-tensor theory and self-tuning
Charmousis, Christos; Copeland, Edmund J.; Saffin, Paul M.; Padilla, Antonio
Authors
EDMUND COPELAND Ed.Copeland@nottingham.ac.uk
Professor of Physics
PAUL SAFFIN paul.saffin@nottingham.ac.uk
Professor of Physics
ANTONIO PADILLA antonio.padilla@nottingham.ac.uk
Professor of Physics
Abstract
Starting from the most general scalar-tensor theory with second order field equations in four dimensions, we establish the unique action that will allow for the existence of a consistent self-tuning mechanism on FLRW backgrounds, and show how it can be understood as a combination of just four base Lagrangians with an intriguing geometric structure dependent on the Ricci scalar, the Einstein tensor, the double dual of the Riemann tensor and the Gauss-Bonnet combination. Spacetime curvature can be screened from the net cosmological constant at any given moment because we allow the scalar field to break Poincar\'e invariance on the self-tuning vacua, thereby evading the Weinberg no-go theorem. We show how the four arbitrary functions of the scalar field combine in an elegant way opening up the possibility of obtaining non-trivial cosmological solutions.
Citation
Charmousis, C., Copeland, E. J., Saffin, P. M., & Padilla, A. (2012). General second-order scalar-tensor theory and self-tuning. Physical Review Letters, 108(5), Article 051101. https://doi.org/10.1103/PhysRevLett.108.051101
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 1, 2012 |
Publication Date | Jan 30, 2012 |
Deposit Date | Apr 24, 2017 |
Publicly Available Date | Apr 24, 2017 |
Journal | Physical Review Letters |
Print ISSN | 0031-9007 |
Electronic ISSN | 1079-7114 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 108 |
Issue | 5 |
Article Number | 051101 |
DOI | https://doi.org/10.1103/PhysRevLett.108.051101 |
Public URL | https://nottingham-repository.worktribe.com/output/708985 |
Publisher URL | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.051101 |
Additional Information | General Second-Order Scalar-Tensor Theory and Self-Tuning. Christos Charmousis, Edmund J. Copeland, Antonio Padilla, and Paul M. Saffin, Phys. Rev. Lett. 108, 051101. |
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