Limiting P-Odd Interactions of Cosmic Fields with Electrons, Protons, and Neutrons

B. M. Roberts, Y. V. Stadnik, V. A. Dzuba, V. V. Flambaum, N. Leefer, and D. Budker
Phys. Rev. Lett. 113, 081601 – Published 19 August 2014

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, Ba+, Tl, Dy, Fr, and 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 7×1015  GeV with an electron, and 3×108  GeV with a proton.

  • Received 10 April 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.081601

© 2014 American Physical Society

Authors & Affiliations

B. M. Roberts1,*, Y. V. Stadnik1,†, V. A. Dzuba1, V. V. Flambaum1,2, N. Leefer3, and D. Budker3,4,5

  • 1School of Physics, University of New South Wales, Sydney 2052, Australia
  • 2New Zealand Institute for Advanced Study, Massey University, Auckland 0745, New Zealand
  • 3Helmholtz Institute Mainz, Johannes Gutenberg University, 55099 Mainz, Germany
  • 4Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA
  • 5Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • *b.roberts@unsw.edu.au
  • y.stadnik@unsw.edu.au

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Issue

Vol. 113, Iss. 8 — 22 August 2014

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