New constraints on Lorentz invariance violation from the neutron electric dipole moment

I. Altarev, C. A. Baker, G. Ban, K. Bodek, M. Daum, M. Fertl, B. Franke, P. Fierlinger, P. Geltenbort, K. Green, M. G.D. Van Der Grinten, P. G. Harris, R. Henneck, M. Horras, P. Iaydjiev, S. N. Ivanov, N. Khomutov, K. Kirch, S. Kistryn, A. KnechtA. Kozela, F. Kuchler, B. Lauss, T. Lefort, Y. Lemière, A. Mtchedlishvili, O. Naviliat-Cuncic, J. M. Pendlebury, G. Petzoldt, E. Pierre, F. M. Piegsa, G. Pignol, G. Quéméner, D. Rebreyend, S. Roccia, P. Schmidt-Wellenburg, N. Severijns, D. Shiers, K. F. Smith, J. Zejma, J. Zenner, G. Zsigmond

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


We propose an original test of Lorentz invariance in the interaction between a particle spin and an electromagnetic field and report on a first measurement using ultracold neutrons. We used a high-sensitivity neutron electric dipole moment (nEDM) spectrometer and searched for a direction dependence of an nEDM signal leading to a modulation of its magnitude at periods of 12 and 24 hours. We constrain such a modulation to d12 < 10×10-25e cm and d24 < 14×10-25e cm at 95% C.L. The result translates into a limit on the energy scale for this type of Lorentz violation effect at the level of ϵLV > 1010 GeV.

Original languageEnglish
Article number51001
JournalEurophysics Letters
Issue number5
StatePublished - 20 Dec 2010
Externally publishedYes


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