6533b862fe1ef96bd12c6219

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Observation of direct CP violation in kaon decays

Konrad Kleinknecht

subject

PhysicsParticle physicsCabibbo–Kobayashi–Maskawa matrixmedia_common.quotation_subjectHigh Energy Physics::PhenomenologyParity (physics)Cosmological modelWeak interactionAsymmetryNuclear physicssymbols.namesakeElectromagnetic calorimetersymbolsCP violationHigh Energy Physics::ExperimentHamiltonian (quantum mechanics)media_common

description

A small matter-antimatter asymmetry of the weak force was experimentally established. This CP violation may be related to the small excess of matter from the big bang. The nature of CP violation in the K0 system has been clarified after 37 years of experimentation: it is due to a small part of the weak interaction (“milliweak interaction”). A non-trivial phase in the weak quark mixing matrix generates “direct CP violation” in the weak Hamiltonian. The experiments demonstrating direct CP violation are discussed.

yearjournalcountryeditionlanguage
2019-03-29
https://doi.org/10.1887/0750308672/b1133c8