Test of Lorentz Invariance with Spin Precession of Ultracold Neutrons

Harris, Philip and et al, (2009) Test of Lorentz Invariance with Spin Precession of Ultracold Neutrons. Physical Review Letters, 103 (8). 081602. ISSN 0031-9007

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A 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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Philip Harris
Date Deposited: 06 Feb 2012 20:09
Last Modified: 03 Jul 2019 01:22
URI: http://sro.sussex.ac.uk/id/eprint/24319

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