Equivalence Principle Violations and Couplings of a Light Dilaton
By T. Damour, John Donoghue. 2010
199 citations recorded by the source corpus.
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-principleviolating effects varying like the inverse cubic root of the atomic number - A 1/3 . We provide a general parameterization 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.
View Paper: https://www.semanticscholar.org/paper/1d8d4f0ff05ab011e6470f03192ac37b79359ae8
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Citations in the corpus
- Theoretical aspects of the equivalence principle (2012, methodology): “Coming back to the issue of EP violation, one might use the idea of a (partially) anthropic selection of coupling constants to predict that the equivalence principle should be violated at some level [25].”
- Varying Constants, Gravitation and Cosmology (2010, methodology): “In the formalism developed in [122, 121], see Section 5.”
- Generalized Curvature-Matter Couplings in Modified Gravity (2014, background): “r R, the matter Lagrangian density L m, the derivatives of the scalar field, and the trace ˝ = ˝ of the “reduced” energy-momentum tensor, f RR+ 3r r f R 2(f f Lm L m) = 1 2 f Lm ˝ f (r˚)2r ˚r˚; (110) By taking the covariant divergence of Eq. (107), we obtain for the covariant divergence of the “redu”
- AION: an atom interferometer observatory and network (2019, background): “wo atom interferometers, nis the number of large-momentum transfer kicks and cis the speed of light. The simplest possibility is that the ultra-light scalar DM couples linearly to Standard Model elds [38,39] through some interaction of the form Llin int ˙ ˚(x;t) p 4ˇG N d m e m eee 1 4 dF F + b˚(x”