The Equivalence Principle and the Constants of Nature

Details The Equivalence Principle and the Constants of Nature The Equivalence Principle and the Constants of Nature

2009-06-17

arxiv.org/abs/0906.3174v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages; invited talk at the ISSI Workshop on the Nature of Gravity: Confronting Theory and Experiment in Space, Bern, Switze

Scientific paper

We briefly review the various contexts within which one might address the issue of ``why'' the dimensionless constants of Nature have the particular values that they are observed to have. Both the general historical trend, in physics, of replacing a-priori-given, absolute structures by dynamical entities, and anthropic considerations, suggest that coupling ``constants'' have a dynamical nature. This hints at the existence of observable violations of the Equivalence Principle at some level, and motivates the need for improved tests of the Equivalence Principle.

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