Screening Vector Field Modifications of General Relativity

Abstract

A screening mechanism for conformal vector-tensor modifications of general relativity is proposed. The conformal factor depends on the norm of the vector field and makes the field to vanish in high dense regions, whereas drives it to a non-null value in low density environments. Such process occurs due to a spontaneous symmetry breaking mechanism and gives rise to both the screening of fifth forces as well as Lorentz violations. The cosmology and local constraints are also computed.

10 pages, 4 figures, revised version, to be published in PLB

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• Detecting Domain Walls in Laboratory Experiments
• Charged Dark Matter and the $H_0$ tension
• Cosmology in massive gravity with effective composite metric
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• Doubly coupled matter fields in massive bigravity
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• Vector Field Dynamics: Field Equations and Energy Tensor