We compare the relative precession frequencies of Hg and Cs magnetometers as a function of the position of two 475 kg lead masses with respect to an applied magnetic field. Our observations limit the size of a possible monopole-dipole interaction expected to be produced by a pseudoscalar particle such as the axion. For a range of 20 cm, the products of the scalar and pseudoscalar couplings (gₛgₚ/c) are found to be less than 2.3×10^-29 and 3.6×10^-29 for couplings to the electron and neutron spins, respectively. The $e(n)$ limits are approximately 3 (4) orders of magnitude better than earlier experiments.
No takes yet. Share an insight, caveat, or question.
Youdin et al. (1996) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: