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Shape dependence of Vainshtein screening

Bloomfield, Jolyon K.; Burrage, Clare; Davis, Anne-Christine

Authors

Jolyon K. Bloomfield

Anne-Christine Davis



Abstract

Scalar field theories that possess a Vainshtein mechanism are able to dynamically suppress the associated fifth forces in the presence of massive sources through derivative nonlinearities. The resulting equations of motion for the scalar are highly nonlinear, and therefore very few analytic solutions are known. Here, we present a brief investigation of the structure of Vainshtein screening in symmetrical configurations, focusing in particular on the spherical, cylindrical and planar solutions that are relevant for observations of the cosmic web. We consider Vainshtein screening in both the Galileon model, where the nonlinear terms involve second derivatives of the scalar, and a k-essence theory, where the nonlinear terms involve only first derivatives of the scalar. We find that screening, and consequently the suppression of the scalar force, is most efficient around spherical sources, weaker around cylindrical sources and can be absent altogether around planar sources.

Journal Article Type Article
Publication Date Apr 7, 2015
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume D91
Issue 8
Article Number 083510
APA6 Citation Bloomfield, J. K., Burrage, C., & Davis, A. (2015). Shape dependence of Vainshtein screening. Physical Review D, D91(8), https://doi.org/10.1103/PhysRevD.91.083510
DOI https://doi.org/10.1103/PhysRevD.91.083510
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.083510
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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