Constraints on exotic spin-velocity-dependent interactions

Kai Wei, Wei Ji (), Changbo Fu (), Arne Wickenbrock, Victor V. Flambaum, Jiancheng Fang and Dmitry Budker
Additional contact information
Kai Wei: Beihang University
Wei Ji: GSI Helmholtzzentrum für Schwerionenforschung
Changbo Fu: Fudan University
Arne Wickenbrock: GSI Helmholtzzentrum für Schwerionenforschung
Victor V. Flambaum: Johannes Gutenberg-Universität Mainz
Jiancheng Fang: Beihang University
Dmitry Budker: GSI Helmholtzzentrum für Schwerionenforschung

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Experimental searches for exotic spin-dependent forces are attracting a lot of attention because they allow to test theoretical extensions to the standard model. Here, we report an experimental search for possible exotic spin-dependent force, specifically spin-and-velocity-dependent forces, by using a K-Rb-21Ne co-magnetometer and a tungsten ring featuring a high nucleon density. Taking advantage of the high sensitivity of the co-magnetometer, the pseudomagnetic field from this exotic force is measured to be ≤7 aT. This sets limits on coupling constants for the neutron-nucleon and proton-nucleon interactions in the range of ≥0.1 m (mediator boson mass ≤2 μeV). The coupling constant limits are established to be $$|{g}_{V}^{n}|\,\le \,8.2\times 1{0}^{-11}$$ ∣ g V n ∣ ≤ 8.2 × 1 0 − 11 and $$|{g}_{V}^{p}|\,\le \,3.7\times 1{0}^{-10}$$ ∣ g V p ∣ ≤ 3.7 × 1 0 − 10 , which are more than one order of magnitude tighter than astronomical and cosmological limits on the coupling between the new gauge boson such as Z’ and standard model particles.

Date: 2022
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DOI: 10.1038/s41467-022-34924-z

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