# FAST TRACK COMMUNICATION: Phenomenology of the equivalence principle with light scalars

@article{Damour2010FASTTC, title={FAST TRACK COMMUNICATION: Phenomenology of the equivalence principle with light scalars}, author={T. Damour and John Donoghue}, journal={Classical and Quantum Gravity}, year={2010} }

Light scalar particles with couplings of sub-gravitational strength, which can generically be called 'dilatons', can produce violations of the equivalence principle. However, in order to understand experimental sensitivities one must know the coupling of these scalars to atomic systems. We report here on a study of the required couplings. We give a general Lagrangian with five independent dilaton parameters and calculate the 'dilaton charge' of atomic systems for each of these. Two combinations… Expand

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