6533b824fe1ef96bd12801ed
RESEARCH PRODUCT
Improved limit on the directly measured antiproton lifetime
Yasuyuki MatsudaM. BesirliStefan UlmerChristian OspelkausChristian OspelkausS. SellnerM. BohmanJochen WalzH. NagahamaKlaus BlaumChristian SmorraWolfgang QuintYasunori YamazakiA. MooserJ. HarringtonToshio TanakaG. SchneiderTakashi HiguchiM. Borchertsubject
CPT symmetryPenning trapGeneral Physics and Astronomypenning traps01 natural sciencesLower limit010305 fluids & plasmasNuclear physicsContinuous monitoring0103 physical sciencesddc:530Limit (mathematics)Physics::Atomic Physics010306 general physicsNuclear ExperimentPhysicsCPT invariancePhysicsResearchContinuous monitoringDirect observationsDirect observationConfidence levelsPenning trapCharge parityAntiprotonlifetimesPhysics::Accelerator PhysicsCP violationHigh Energy Physics::ExperimentDewey Decimal Classification::500 | Naturwissenschaften::530 | PhysikPräzisionsexperimente - Abteilung BlaumantiprotonsParticle Physics - Experimentdescription
Continuous monitoring of a cloud of antiprotons stored in a Penning trap for 405 days enables us to set an improved limit on the directly measured antiproton lifetime. From our measurements we extract a storage time of $3.15\times {10}^{8}$ equivalent antiproton-seconds, resulting in a lower lifetime limit of ${\tau }_{\bar{{\rm{p}}}}\gt 10.2\,{\rm{a}}$ with a confidence level of $68 \% $. This result improves the limit on charge-parity-time violation in antiproton decays based on direct observation by a factor of 7.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-31 |