Altarev, I.
Baker, C. A.
Ban, G.
Bison, Georg
Bodek, K.
Daum, M.
Fierlinger, P.
Geltenbort, P.
Green, K.
Grinten, M. G. D. van der
Gutsmiedl, E.
Harris, P. G.
Heil, W.
Henneck, R.
Horras, M.
Iaydjiev, P.
Ivanov, S. N.
Khomutov, N.
Kirch, K.
Kistryn, S.
Knecht, A.
Knowles, Paul E.
Kozela, A.
Kuchler, F.
Kuźniak, M.
Lauer, T.
Lauss, B.
Lefort, T.
Mtchedlishvili, A.
Naviliat-Cuncic, O.
Pazgalev, Anatoly
Pendlebury, J. M.
Petzoldt, G.
Pierre, E.
Pignol, G.
Quéméner, G.
Rebetez, Martin
Rebreyend, D.
Roccia, S.
Rogel, G.
Severijns, N.
Shiers, D.
Sobolev, Yu.
Weis, Antoine
Zejma, J.
Zsigmond, G.
2009-08-20
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 <i>b</i><sub>⊥</sub><2×10⁻²⁰ eV (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 |<i>g</i><sub><i>n</i></sub>|<0.3 eV/<i>c</i>² m from a spin-dependent interaction with the Sun. Analyzing the gravitational interaction with the Earth, based on previous data, yields a more stringent limit |<i>g</i><sub><i>n</i></sub>|<3×10⁻⁴ eV/<i>c</i>² m
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info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.103.081602
info:eu-repo/semantics/openAccess
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Physical Review Letters. - 2009, vol. 103, no. 8, p. 081602
info:eu-repo/classification/udc/53
Test of Lorentz invariance with spin precession of ultracold neutrons
http://purl.org/coar/resource_type/c_6501