A Laboratory Search for a Long-Range T-odd, P-odd Interaction from Axion-Like Particles using Dual Species Nuclear Magnetic Resonance with Polarized Xe-129 and Xe-131 Gas

TL;DR

This study uses dual species nuclear magnetic resonance with polarized Xe-129 and Xe-131 gases to set new, significantly improved limits on hypothetical long-range T- and P-odd interactions potentially mediated by axion-like particles.

Contribution

It introduces a novel experimental approach with dual species NMR to enhance sensitivity to monopole-dipole interactions, significantly improving existing laboratory constraints.

Findings

New limits on T- and P- violating interactions are established.

Limits on the product gsgp improve previous bounds by 100 times.

High-precision measurements achieved with relaxation times of about 20 seconds.

Abstract

We place new limits on potential T- and P- violating monopole-dipole interactions between unpolarized nucleons and neutrons using dual species magnetic resonance in polarzed Xe gas. Free-induction decay transients with relaxation times ~20 s allow high precision measurements of the NMR frequencies, whose ratios cancel magnetic fluctuations. The new limits on the product gsgp improve on previous laboratory work by 2 orders of magnitude.