Constraints on Spin-Dependent Short-Range Interaction between Nucleons
- 3 September 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 111 (10), 100801
- https://doi.org/10.1103/physrevlett.111.100801
Abstract
We search for a spin-dependent - and -violating nucleon-nucleon interaction mediated by light pseudoscalar bosons such as axions or axionlike particles. We employ an ultrasensitive low-field magnetometer based on the detection of free precession of colocated and nuclear spins using SQUIDs as low-noise magnetic flux detectors. The precession frequency shift in the presence of an unpolarized mass was measured to determine the coupling of pseudoscalar particles to the spin of the bound neutron. For boson masses between 2 and (force ranges between and ) we improved the laboratory upper bounds by up to 4 orders of magnitude.
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