Experimental limit on an exotic parity-odd spin- and velocity-dependent interaction using an optically polarized vapor

Abstract

Exotic spin-dependent interactions between fermions have recently attracted attention in relation to theories beyond the Standard Model. The exotic interactions can be mediated by hypothetical fundamental bosons which may explain several unsolved mysteries in physics. Here we expand this area of research by probing an exotic parity-odd spin- and velocity-dependent interaction between the axial-vector electron coupling and the vector nucleon coupling for polarized electrons. This experiment utilizes a high-sensitivity atomic magnetometer, based on an optically polarized vapor that is a source of polarized electrons, and a solid-state mass containing unpolarized nucleons. The atomic magnetometer can detect an effective magnetic field induced by the exotic interaction between unpolarized nucleons and polarized electrons. We set an experimental limit on the electron-nucleon coupling $g_{\text{A}}^{\text{e}}{g}_{\text{V}}^{\text{N}}<$ $10^{-30}$ at the mediator boson mass below $10^{-4}$ eV, significantly improving the current limit by up to 17 orders of magnitude.

17 pages, 5 figures

References in corpus (7)

• Spin-Dependent Macroscopic Forces from New Particle Exchange
• Preferred-Frame and CP-Violation Tests with Polarized Electrons
• New CP-violation and preferred-frame tests with polarized electrons
• Constraints on exotic spin-dependent interactions between electrons from helium fine-structure spectroscopy
• Laboratory Search for Spin-dependent Short-range Force from Axion-Like-Particles using Optically Polarized 3He gas
• Probing low-mass vector bosons with parity nonconservation and nuclear anapole moment measurements in atoms and molecules
• Search for exotic spin-dependent interactions with a spin-exchange relaxation-free magnetometer

Cited by in corpus (2)

• Searches for exotic spin-dependent interactions with spin sensors
• Search for an exotic parity-odd spin- and velocity-dependent interaction using a magnetic force microscope