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Higher order clockwork gravity

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

Authors

Florian Niedermann

Antonio Padilla

Paul M. Saffin



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.

Journal Article Type Article
Publication Date Nov 12, 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
APA6 Citation Niedermann, F., Padilla, A., & Saffin, P. M. (2018). Higher order clockwork gravity. Physical Review D, 98(10), https://doi.org/10.1103/physrevd.98.104014
DOI https://doi.org/10.1103/physrevd.98.104014
Keywords Physics and astronomy (miscellaneous)
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.104014
Additional Information ©2018 American Physical Society

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