Experimental Constraint on an Exotic Spin- and Velocity-Dependent Interaction in the Sub-meV Range of Axion Mass with a Spin-Exchange Relaxation-Free Magnetometer
arXiv:1702.02974 · doi:10.1103/PhysRevLett.121.091802
Abstract
We conducted a search for an exotic spin- and velocity-dependent interaction for polarized electrons with an experimental approach based on a high-sensitivity spin-exchange relaxation-free (SERF) magnetometer, which serves as both a source of polarized electrons and a magnetic-field sensor. The experiment aims to sensitively detect magnetic-fieldlike effects from the exotic interaction between the polarized electrons in a SERF vapor cell and unpolarized nucleons of a closely located solid-state mass. We report experimental results on the interaction with 82 h of data averaging, which sets an experimental limit on the coupling strength around for the axion mass eV, within the important axion window.
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- Improved limits on the spin- and velocity-dependent exotic interaction in the micrometer range
- Constraints on Axion Dark Matter by Spin-Dependent Macroscopic Force
- Search for an exotic parity-odd spin- and velocity-dependent interaction using a magnetic force microscope