Publication Date
2010
Journal or Book Title
Physics Review D
Abstract
We consider possible violations of the equivalence principle through the exchange of a light “dilaton-like” scalar field. Using recent work on the quark-mass dependence of nuclear binding, we find that the dilaton-quark-mass coupling induces significant equivalence-principle-violating effects varying like the inverse cubic root of the atomic number—A-1/3. We provide a general parametrization of the scalar couplings, but argue that two parameters are likely to dominate the equivalence-principle phenomenology. We indicate the implications of this framework for comparing the sensitivities of current and planned experimental tests of the equivalence principle.
Volume
82
Issue
8
Recommended Citation
Donoghue, John and Damour, Thibault, "Equivalence Principle Violations and Couplings of a Light Dilaton" (2010). Physics Review D. 245.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/245
Comments
This is the pre-published version which is collected from arXiv. The published version is at http://prd.aps.org/abstract/PRD/v82/i8/e084033