Comment on "Axion induced oscillating electric dipole moments"

Abstract

In the recent work [Phys. Rev. D 91, 111702(R) (2015)], C. Hill concludes that the axion electromagnetic anomaly induces an oscillating electron electric dipole moment of frequency $m_a$ and strength $\sim 10^{-32}e$ cm, in the limit $v/c\to 0$ for the axion field. Here, we demonstrate that a proper treatment of this problem in the lowest order yields $\text{no}$ electric dipole moment of the electron in the same limit. Instead, oscillating electric dipole moments of atoms and molecules are produced by different mechanisms.

arXiv comment2 pages. Version accepted for publication as a Comment in Physical Review D

References in corpus (5)

• Axion-induced effects in atoms, molecules and nuclei: Parity nonconservation, anapole moments, electric dipole moments, and spin-gravity and spin-axion momentum couplings
• Axion Dark Matter Detection with Cold Molecules
• Parity-violating interactions of cosmic fields with atoms, molecules, and nuclei: Concepts and calculations for laboratory searches and extracting limits
• Limiting P-odd interactions of cosmic fields with electrons, protons and neutrons
• Axion Induced Oscillating Electric Dipole Moments

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• Manifestations of dark matter and variations of fundamental constants in atoms and astrophysical phenomena
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