Year: 2014
Type: article
Abstract: We propose methods for extracting limits on the strength of $P$-odd interactions of pseudoscalar and pseudovector cosmic fields with electrons, protons, and neutrons, by exploiting the static and dynamic parity-nonconserving amplitudes and electric dipole moments they induce in atoms. Candidates for such fields are dark matter (including axions) and dark energy, as well as several more exotic sources described by Lorentz-violating standard model extensions. Atomic calculations are performed for H, Li, Na, K, Rb, Cs, ${\mathrm{Ba}}^{+}$, Tl, Dy, Fr, and ${\mathrm{Ra}}^{+}$. From these calculations and existing measurements in Dy, Cs, and Tl, we constrain the interaction strengths of the parity-violating static pseudovector cosmic field to be $7\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}15}\text{ }\mathrm{GeV}$ with an electron, and $3\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}8}\text{ }\mathrm{GeV}$ with a proton.
Source: Physical Review Letters
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2076583299