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Author(s): Ficek, F; Kimball, DFJ; Kozlov, MG; Leefer, N; Pustelny, S; Budker, D | Abstract: © 2017 American Physical Society. Agreement between theoretical calculations of atomic structure and spectroscopic measurements… Click to show full abstract
Author(s): Ficek, F; Kimball, DFJ; Kozlov, MG; Leefer, N; Pustelny, S; Budker, D | Abstract: © 2017 American Physical Society. Agreement between theoretical calculations of atomic structure and spectroscopic measurements is used to constrain possible contribution of exotic spin-dependent interactions between electrons to the energy differences between states in helium-4. In particular, constraints on dipole-dipole interactions associated with the exchange of pseudoscalar bosons (such as axions or axion-like particles) with masses 10-2"m"104eV are improved by a factor of ∼100. The first atomic-scale constraints on several exotic velocity-dependent dipole-dipole interactions are established as well.
Journal Title: Physical Review A
Year Published: 2017
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