6533b822fe1ef96bd127cd8d
RESEARCH PRODUCT
Constraining interactions mediated by axion-like particles with ultracold neutrons
T. LefortS. KomposchS. KomposchPaul E. KnowlesJens-uwe VoigtD. RiesD. RiesNathal SeverijnsD. RebreyendJ. ZennerGuillaume PignolJ. KrempelS. RocciaKlaus KirchKlaus KirchOscar Naviliat-cuncicV. HélaineV. HélaineB. FrankeB. FrankeGeorg BisonMartin FertlMartin FertlMartin BurghoffG. QuéménerZoran D. GrujićMalgorzata KasprzakA. KozelaGeza ZsigmondFlorian M. PiegsaG. BanJacek ZejmaP. Schmidt-wellenburgBernhard LaussP. N. PrashanthM. DaumG. WyszynskiG. WyszynskiY. KermaidicS. AfachS. AfachY. LemièreH.-c. KochH.-c. KochA. MtchedlishviliAllard SchnabelAntoine WeisKazimierz Bodeksubject
Nuclear and High Energy PhysicsNeutron magnetic momentNeutron electric dipole momentFOS: Physical sciences[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsPHYSICSHigh Energy Physics - Experiment (hep-ex)Complementary experimentsHigh Energy Physics - Phenomenology (hep-ph)AxionMOMENTS[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]SEARCH0103 physical sciencesAxion-like particleultracold neutronsNeutron010306 general physicsCoupling constantLarmor precessionPhysics[PHYS]Physics [physics]010308 nuclear & particles physicsNeutron electric dipole moment[SPI.PLASMA]Engineering Sciences [physics]/Plasmaslcsh:QC1-999neutron electric dipole momentShort range spin-dependent interactionElectric dipole momentHigh Energy Physics - PhenomenologyCP violationaxion-like particleaxionUltracold neutronsshort range spin-dependent interactionFORCESUltracold neutronsCP violation; Short range spin-dependent interaction; Axion; Axion-like particle; Ultracold neutrons; Neutron electric dipole momentlcsh:Physicsdescription
We report a new limit on a possible short range spin-dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and Hg199 atoms confined in the same volume. The measurement was performed in a ~1μT vertical magnetic holding field with the apparatus searching for a permanent electric dipole moment of the neutron at the Paul Scherrer Institute. A possible coupling between freely precessing polarized neutron spins and unpolarized nucleons of the wall material can be investigated by searching for a tiny change of the precession frequencies of neutron and mercury spins. Such a frequency change can be interpreted as a consequence of a short range spin-dependent interaction that could possibly be mediated by axions or axion-like particles. The interaction strength is proportional to the CP violating product of scalar and pseudoscalar coupling constants gSgP. Our result confirms limits from complementary experiments with spin-polarized nuclei in a model-independent way. Limits from other neutron experiments are improved by up to two orders of magnitude in the interaction range of 10-6<λ<10-4m.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-05-01 |