AI Article Synopsis
- High-intensity neutron beams at the European Spallation Source (ESS) create new opportunities for fundamental research, particularly in the search for dark matter.
- A new Ramsey neutron-beam experiment aims to detect ultralight axion dark matter by examining its effects on neutron spins, which would rotate based on their interaction with the dark matter halo.
- This experiment, conducted at the HIBEAM beamline, is projected to increase the sensitivity of axion-neutron coupling measurements by 2-3 orders of magnitude across a specific mass range (10^{-22} eV to 10^{-16} eV).
Article Abstract
High-intensity neutron beams, such as those available at the European Spallation Source (ESS), provide new opportunities for fundamental discoveries. Here, we discuss a novel Ramsey neutron-beam experiment to search for ultralight axion dark matter through its coupling to neutron spins, which would cause the neutron spins to rotate about the velocity of the neutrons relative to the dark matter halo. We estimate that experiments at the HIBEAM beamline with a 50 m free flight path at the ESS can improve the sensitivity to the axion-neutron coupling compared to the current best laboratory limits by up to 2-3 orders of magnitude over the axion mass range 10^{-22} eV-10^{-16} eV.
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| http://dx.doi.org/10.1103/PhysRevLett.133.181001 | DOI Listing |
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