Journal or Book Title
Physics Review D
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.
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