Issue |
EPL
Volume 92, Number 5, December 2010
|
|
---|---|---|
Article Number | 51001 | |
Number of page(s) | 5 | |
Section | The Physics of Elementary Particles and Fields | |
DOI | https://doi.org/10.1209/0295-5075/92/51001 | |
Published online | 04 January 2011 |
New constraints on Lorentz invariance violation from the neutron electric dipole moment
1
Technische Universität München - D-85748 Garching, Germany, EU
2
Rutherford Appleton Laboratory - Chilton, Didcot, Oxon OX11 0QX, UK, EU
3
LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3 - F-14050 Caen, France, EU
4
Marian Smoluchowski Institute of Physics, Jagiellonian University - 30-059 Cracow, Poland, EU
5
Excellence Cluster “Universe”, Technische Universität München - D-85748 Garching, Germany, EU
6
Paul Scherrer Institut (PSI) - CH-5232 Villigen-PSI, Switzerland
7
Physics Departement, University of Virginia - Charlottesville, VA, USA
8
Institut Laue-Langevin - F-38042 Grenoble Cedex, France, EU
9
Department of Physics and Astronomy, University of Sussex - Falmer, Brighton BN1 9QH, UK, EU
10
JINR - 141980 Dubna, Moscow region, Russia
11
ETH Zürich - CH-8093 Zürich, Switzerland
12
Henryk Niedwodniczański Institute for Nuclear Physics - 31-342 Cracow, Poland, EU
13
LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble 53 F-38026 Grenoble Cedex, France, EU
14
Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven - B-3001 Leuven, Belgium, EU
15
Johannes-Gutenberg-Universität - D-55128 Mainz, Germany, EU
a
pignol@lpsc.in2p3.fr
b
Stephanie.Roccia@fys.kuleuven.be
Received:
20
October
2010
Accepted:
23
November
2010
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 .
PACS: 11.30.Cp – Lorentz and Poincaré invariance / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 13.40.Em – Electric and magnetic moments
© EPLA, 2010
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