Higher order clockwork gravity

Niedermann, Florian; Padilla, Antonio; Saffin, Paul M.

Abstract

We present a higher order generalisation of the clockwork mechanism starting from an underlying non-linear multigravity theory with a single scale and nearest neighbour ghost-free interactions. Without introducing any hierarchies in the underlying potential, this admits a family of Minkowski vacua around which massless graviton fluctuations couple to matter exponentially more weakly than the heavy modes. Although multi-diffeomorphisms are broken to the diagonal subgroup in our theory, an asymmetric distribution of conformal factors in the background vacua translates this diagonal symmetry into an asymmetric shift of the graviton gears. In particular we present a TeV scale multigravity model with (10) sites that contains a massless mode whose coupling to matter is Planckian, and a tower of massive modes starting at a TeV mass range and with TeV strength couplings. This suggests a possible application to the hierarchy problem as well as a candidate for dark matter.

Citation

Niedermann, F., Padilla, A., & Saffin, P. M. (2018). Higher order clockwork gravity. Physical Review D, 98(10), Article 104014. https://doi.org/10.1103/physrevd.98.104014

• Journal Article Type: Article
• Acceptance Date: Oct 30, 2018
• Online Publication Date: Nov 12, 2018
• Publication Date: Nov 12, 2018
• Deposit Date: Nov 16, 2018
• Publicly Available Date: Nov 19, 2018
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 98
• Issue: 10
• Article Number: 104014
• DOI: https://doi.org/10.1103/physrevd.98.104014
• Keywords: Physics and astronomy (miscellaneous)
• Public URL: https://nottingham-repository.worktribe.com/output/1276795
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.104014
• Additional Information: ©2018 American Physical Society