Spectroscopy as a test of Coulomb's law - A probe of the hidden sector

Understand

High precision spectroscopy can provide a sensitive tool to test Coulomb's law on atomic length scales.

• This can then be used to constrain particles such as extra "hidden" photons or minicharged particles that are predicted in many extensions of the standard model, and which cause small deviations from Coulomb's law.
• In this paper we use a variety of transitions in atomic hydrogen, hydrogenic ions, and exotic atoms to probe Coulomb's law.
• This extends the region of pure Coulomb's law tests to larger masses.