biostudies-literatureWei KDeutsche ForschungsgemeinschaftDeutsche Forschungsgemeinschaft (German Research Foundation)China Postdoctoral Science Foundation7387https://www.ebi.ac.uk/biostudies/studies/S-EPMC9712588biostudies-literatureUnknown13(1)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 [Formula: see text] and [Formula: see text], which are more than one Nature communicationsConstraints on exotic spin-velocity-dependent interactions.PMC97125882021M700345500314205390831469Fu CFang JJi WBudker DFlambaum VVWickenbrock AWei KfalseConstraints on exotic spin-velocity-dependent interactions.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 [Formula: see text] and [Formula: see text], which are more than one 2022-01-01T00:00:00Z2022 Nov2026-05-05T02:50:43.157Z2025-04-06T04:53:13.089ZS-EPMC97125883645072310.1038/s41467-022-34924-z