6533b7ddfe1ef96bd1273f4a
RESEARCH PRODUCT
Sixfold improved single particle measurement of the magnetic moment of the antiproton
Yasunori YamazakiS. SellnerG. SchneiderA. MooserChristian SmorraJ. HarringtonKlaus BlaumToshio TanakaStefan UlmerTakashi HiguchiChristian OspelkausChristian OspelkausWolfgang QuintJochen WalzM. BesirliM. BorchertYasuyuki MatsudaH. Nagahamasubject
AntiparticleParticle physicsLorentz transformationSciencelorentzGeneral Physics and Astronomysystem01 natural sciencesArticleGeneral Biochemistry Genetics and Molecular BiologyCosmologyNuclear physicssymbols.namesakeStandard-Model Extension0103 physical sciencesNuclear Physics - Experimentcpt010306 general physicsNuclear ExperimentPhysicsMultidisciplinary010308 nuclear & particles physicsQpenning trapParity (physics)General ChemistryPenning trapAntiprotonAntimattersymbolstestsddc:500Präzisionsexperimente - Abteilung Blaumdescription
Our current understanding of the Universe comes, among others, from particle physics and cosmology. In particle physics an almost perfect symmetry between matter and antimatter exists. On cosmological scales, however, a striking matter/antimatter imbalance is observed. This contradiction inspires comparisons of the fundamental properties of particles and antiparticles with high precision. Here we report on a measurement of the g-factor of the antiproton with a fractional precision of 0.8 parts per million at 95% confidence level. Our value /2=2.7928465(23) outperforms the previous best measurement by a factor of 6. The result is consistent with our proton g-factor measurement gp/2=2.792847350(9), and therefore agrees with the fundamental charge, parity, time (CPT) invariance of the Standard Model of particle physics. Additionally, our result improves coefficients of the standard model extension which discusses the sensitivity of experiments with respect to CPT violation by up to a factor of 20.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-18 |