Journal
PHYSICAL REVIEW D
Volume 82, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.084033
Keywords
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Funding
- NSF [PHY- 055304, PHY - 0855119]
- Foundational Questions Institute
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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.
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