6533b85efe1ef96bd12c080d
RESEARCH PRODUCT
Test of Lorentz invariance with spin precession of ultracold neutrons
J. M. PendleburyN. V. KhomutovWerner HeilNatalis SeverijnsBernhard LaussA. KozelaMartin RebetezA. KnechtOscar Naviliat-cuncicYu. SobolevA. MtchedlishviliAntoine WeisS. RocciaGuillaume PignolP. GeltenbortT. LefortG. RogelJacek ZejmaD. ShiersC.a. BakerG. BanPhilip HarrisM. KuźniakM. G. D. Van Der GrintenReinhold HenneckP. IaydjievI. AltarevG. QuéménerErwin GutsmiedlSt. KistrynGeorg BisonF. KuchlerA. S. PazgalevS. N. IvanovM. HorrasT. LauerKazimierz BodekD. RebreyendK. GreenPeter FierlingerPaul E. KnowlesM. DaumG. PetzoldtE. PierreKlaus KirchGeza Zsigmondsubject
Physics010308 nuclear & particles physicsGeneral Physics and AstronomyFOS: Physical sciencesElementary particleLorentz covariance[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciences7. Clean energyDipoleQuantum mechanics0103 physical sciencesPrecessionUltracold neutronsNeutronAtomic physicsNuclear Experiment (nucl-ex)010306 general physicsNucleonSpin (physics)Nuclear Experimentdescription
A clock comparison experiment, analyzing the ratio of spin precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms is reported. %57 No daily variation of this ratio could be found, from which is set an upper limit on the Lorentz invariance violating cosmic anisotropy field $b_{\bot} < 2 \times 10^{-20} {\rm eV}$ (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 $|g_n| < 0.3 $eV/$c^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 $|g_n| < 3 \times 10^{-4} $eV/$c^2 $m.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-08-20 |