Constraints on Spin-Dependent Short-Range Interaction between Nucleons
Kathlynne Tullney, Fabian Allmendinger, Martin Burghoff, Werner Heil,, Sergej Karpuk, Wolfgang Kilian, Silvia Knappe-Gr\"uneberg, Wolfgang M\"uller,, Ulrich Schmidt, Allard Schnabel, Frank Seifert, Yuri Sobolev, Lutz Trahms
TL;DR
This paper reports an experimental search for a hypothetical spin-dependent short-range force between nucleons, using a highly sensitive magnetometer to detect potential interactions mediated by light pseudoscalar particles like axions.
Contribution
It introduces a novel experimental technique employing co-located 3He and 129Xe spins with SQUID detection to constrain spin-dependent forces at short ranges.
Findings
No evidence of the hypothesized interaction was observed.
The experiment sets new upper limits on the strength of spin-dependent short-range forces.
Constraints improve upon previous bounds in certain interaction ranges.
Abstract
We report on the search for a new spin-dependent P- and T-violating interaction between nucleons mediated by light, pseudoscalar bosons such as the axion which was invented to solve the strong CP problem. Our experimental approach is to use an ultra-sensitive low-field magnetometer based on the detection of free precession of co-located 3He and 129Xe nuclear spins using SQUIDs as low-noise magnetic flux detectors. In the presence of an unpolarized mass the precession frequency shif
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