Shape dependence of Vainshtein screening
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PhysRevD.91.083510.pdf
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257.9 KB
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Author(s)
Burrage, Clare
Davis, Anne-Christine
Bloomfield, Jolyon
Date Issued
April 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Bloomfield, Jolyon K., Clare Burrage, and Anne-Christine Davis. “Shape Dependence of Vainshtein Screening.” Physical Review D 91.8 (2015). © 2015 American Physical Society
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.91.083510
