6533b861fe1ef96bd12c5abe
RESEARCH PRODUCT
A new measurement of direct CP violation in the neutral kaon system
D.c. CundyG.m. PierazziniH. D. WahlB. RenkM. CalvettiR. WerthenbachA. NappiM. RostI. HarrusI. MannelliV. GibsonPeter BuchholzB. PanzerP. CalafiuraP. MayerR. CarosiLaurent SerinG. QuastA. WagnerMaria Chiara CarrozzaKonrad KleinknechtH. BlümerR. HagelbergV.m. MarzulliL. GatignonM. HolderPh. HeusseA. KreutzP. GrafströmKen PeachR. FantechiH. G. SanderC. CerriO. PerdereauDaniel FournierH. RohrerG.d. BarrLydia Iconomidou-fayardNiels DobleL. BertanzaE. AugéJ. Van Der LansG. ZechR. HeinzArthur SchafferH.n. NelsonA. BigiD. CowardR. Casalisubject
Systematic errorPhysicsNuclear and High Energy PhysicsParticle physicsValue (computer science)NA48 experimentMolecularElementary particleAtomicNuclear & Particles PhysicsNuclear physicsAmplitudeParticle and Plasma PhysicsEnergy spectrumCP violationNuclearNeutral particleMathematical PhysicsAstronomical and Space SciencesParticle Physics - Experimentdescription
A new measurement of the ratio of the CP-violating amplitudes for $K_{L} \to 2\pi^{0}$ and $K_{L} \to \pi^{+}\pi^{-}$ is reported. The measured value for $\Re = |\eta_{00} / \eta_{ +-}|^{2}$ is $0.9878 \pm 0.0026 \pm 0.0030$, where the first error is the statistical uncertainty and the second is the estimate of the systematic uncertainty. This gives a value for the parameter describing direct CP violation: $\Re$ $\epsilon'/\epsilon = (2.0 \pm 0.7) \times 10^{−3}$ .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-11-04 |