PhysRevLett.103.081602.pdf (170.93 kB)
Test of Lorentz Invariance with Spin Precession of Ultracold Neutrons
journal contribution
posted on 2023-06-08, 05:10 authored by Philip Harris, et alA clock comparison experiment, analyzing the ratio of spin precession frequencies of stored ultracold neutrons and 199Hg atoms, is reported. No daily variation of this ratio could be found, from which is set an upper limit on the Lorentz invariance violating cosmic anisotropy field b<210-20eV (95% C.L.). This is the first limit for the free neutron. This result is also interpreted as a direct limit on the gravitational dipole moment of the neutron |gn|<0.3eV/c2m from a spin-dependent interaction with the Sun. Analyzing the gravitational interaction with the Earth, based on previous data, yields a more stringent limit |gn|<310-4eV/c2m.
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Physical Review LettersISSN
0031-9007External DOI
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8Volume
103Page range
081602Pages
4.0Department affiliated with
- Physics and Astronomy Publications
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2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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