6533b7d2fe1ef96bd125f581
RESEARCH PRODUCT
A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
J M PendleburyS AfachN J AyresC A BakerG BanG BisonK BodekM BurghoffP GeltenbortK GreenW C GriffithM Van Der GrintenZ D GrujicP G HarrisV HelaineP IaydjievS N IvanovM KasprzakY KermaidicK KirchH-c KochS KomposchA KozelaJ KrempelB LaussT LefortY LemiereD J R MayM MusgraveM MusgraveO Naviliat-cuncicF M PiegsaG PignolP N PrashanthG QuéménerM RawlikD RebreyendJ D RichardsonD RiesS RocciaD RozpedzikA SchnabelP Schmidt-wellenburgN SeverijnsD ShiersJ A ThorneA WeisO J WinstonE WurstenJ ZejmaG Zsigmondsubject
Nuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsFOS: Physical sciencesMagnitude (mathematics)01 natural sciencesResonance (particle physics)High Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)Quantum mechanicsPaul-Scherrer InstituteCesium atom0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]NeutronLimit (mathematics)010306 general physicsPhysicsConservation lawmagnetic-momentMagnetic moment010308 nuclear & particles physicsInstrumentation and Detectors (physics.ins-det)QC0793Atomic-Mercury magnetometerElectric dipole momentresonanceQuantum electrodynamicsUltracold neutronsParticle Physics - Experimentdescription
We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons (UCN); an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of $d_\mathrm{n} = -0.21 \pm 1.82 \times10^{-26}$ $e$cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of $3.0 \times10^{-26}$ $e$cm (90% CL) or $ 3.6 \times10^{-26}$ $e$cm (95% CL). This paper is dedicated by the remaining authors to the memory of Prof. J. Michael Pendlebury.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-15 |