Precise Gravitational Tests via the SEE Mission: A Proposal for Space-Based Measurements

TL;DR

The SEE mission proposes space-based gravitational measurements to test unification theories by precisely measuring parameters like G, WEP, and ISL, surpassing current capabilities and potentially revealing new physics.

Contribution

It introduces a space-based experiment capable of measuring gravitational parameters with unprecedented accuracy, enabling tests of fundamental physics theories.

Findings

Measurement accuracy improved by 100-10,000 times

Potential detection of WEP violations and ISL breakdowns

Constraints on the variability of the gravitational constant G

Abstract

The objective of a SEE mission is to support development of unification theory by carrying out sensitive gravitational tests capable of determining whether various alternative theories are compatible with nature. Gravitation is a key "missing link" in unification theory. Nearly all unification theories incorporate gravity at a fundamental level, and therefore precise measurements of gravitational forces will place important constraints on unification theories. Ground-based gravitational measurements to the accuracy required are impossible due to the many sources of noise present in the terrestrial environment. The proposed space-based Satellite Energy Exchange (SEE) mission will measure several important parameters to an accuracy between 100 and 10,000 times better than current or planned measurement capabilities. It will test for time variation of the gravitational "constant" G and for violations of the weak equivalence principle (WEP) and the inverse-square-law (ISL), and it will determine G. It is well-known that the discovery of breakdowns in WEP or ISL and the possible determination of a time-varying G would have significant consequences on virtually all aspects of unification theory.