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Updated: Jun 8, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

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Published on: August 30, 2013

Screening long-range forces through local symmetry restoration.

Kurt Hinterbichler¹, Justin Khoury

¹Center for Particle Cosmology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

Physical Review Letters

|September 28, 2010

Summary

A novel screening mechanism enables a scalar field to mediate cosmic gravitational forces while passing local gravity tests. This mechanism relies on matter-induced symmetry restoration, predicting detectable deviations from general relativity and violations of the equivalence principle.

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Area of Science:

Cosmology
Fundamental Physics
Gravitational Theory

Background:

Existing theories struggle to reconcile long-range gravitational forces with stringent local gravity tests.
Scalar fields are proposed mediators for new forces, but often conflict with experimental constraints.

Purpose of the Study:

To introduce a screening mechanism for a long-range scalar field force.
To ensure consistency with local tests of gravity.
To predict observable deviations from General Relativity and the equivalence principle.

Main Methods:

Proposing a scalar field mechanism based on local symmetry restoration in the presence of matter.
Analyzing the field's behavior in high-density (symmetry restored) and low-density (symmetry broken) regions.
Deriving predictions for solar system experiments and astrophysical observations.

Main Results:

The scalar field mediates a gravitational-strength force over cosmological distances (Mpc scale).
Symmetry restoration at high matter densities hides the force locally, satisfying gravity tests.
Spontaneous symmetry breaking in low-density regions allows the force to manifest.

Conclusions:

The proposed mechanism allows for a cosmologically significant scalar field force consistent with local gravity.
Predictions include detectable deviations from General Relativity and violations of the equivalence principle.
This model is experimentally distinguishable from Brans-Dicke gravity, chameleon theories, and brane-world gravity models.