neutral kaon mixing
E543038
Neutral kaon mixing is a quantum phenomenon in which the neutral kaon and its antiparticle oscillate between each other, leading to distinct short- and long-lived states and providing a key system for studying CP violation in particle physics.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
CP violation system
ⓘ
flavor oscillation ⓘ meson–antimeson mixing ⓘ quantum phenomenon ⓘ |
| characterizedBy |
CP-violating parameter epsilon
GENERATED
ⓘ
lifetime difference between KS and KL GENERATED ⓘ mass difference between KS and KL GENERATED ⓘ off-diagonal elements of mass matrix GENERATED ⓘ |
| describedBy | effective 2x2 Hamiltonian GENERATED ⓘ |
| exhibits |
CP violation
GENERATED
ⓘ
CPT invariance (to experimental precision) GENERATED ⓘ T violation GENERATED ⓘ indirect CP violation GENERATED ⓘ |
| firstObservedIn | 1950s GENERATED ⓘ |
| framework | Standard Model of particle physics GENERATED ⓘ |
| governingInteraction | weak interaction GENERATED ⓘ |
| hasCPViolatingParameterEpsilonMagnitude | about 2.2 x 10^-3 GENERATED ⓘ |
| hasDecayWidthDifference | ΔΓ between KS and KL GENERATED ⓘ |
| hasLongLivedStateLifetime | about 5.1 x 10^-8 s GENERATED ⓘ |
| hasMassDifferenceDeltaM | about 3.5 x 10^-6 eV GENERATED ⓘ |
| hasOscillationFrequency | proportional to mass difference Δm GENERATED ⓘ |
| hasShortLivedStateLifetime | about 0.9 x 10^-10 s GENERATED ⓘ |
| importantFor |
constraining Standard Model parameters
GENERATED
ⓘ
searches for physics beyond the Standard Model GENERATED ⓘ testing CKM matrix GENERATED ⓘ |
| involvesParticle |
K0
GENERATED
ⓘ
anti-K0 GENERATED ⓘ |
| involvesQuarkContent |
down anti-strange
GENERATED
ⓘ
strange anti-down GENERATED ⓘ |
| keyExperiment | Cronin–Fitch CP violation experiment GENERATED ⓘ |
| leadsTo |
K-long state
GENERATED
ⓘ
K-short state GENERATED ⓘ |
| ledTo | discovery of CP violation in 1964 GENERATED ⓘ |
| occursIn | neutral K-meson system GENERATED ⓘ |
| producesFlavorEigenstates |
K0
GENERATED
ⓘ
anti-K0 GENERATED ⓘ |
| producesMassEigenstates |
KL
GENERATED
ⓘ
KS GENERATED ⓘ |
| relatedProcess |
B0–anti-B0 mixing
GENERATED
ⓘ
Bs0–anti-Bs0 mixing GENERATED ⓘ D0–anti-D0 mixing GENERATED ⓘ |
| sensitiveTo |
box diagrams with W bosons
GENERATED
ⓘ
top-quark contributions GENERATED ⓘ virtual up-type quarks GENERATED ⓘ |
| studiedIn |
flavor physics
GENERATED
ⓘ
kaon factories GENERATED ⓘ |
| timeEvolutionDescribedBy | Schrödinger-like equation for two-state system GENERATED ⓘ |
| usedToTest |
CPT symmetry
GENERATED
ⓘ
unitarity of CKM matrix GENERATED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.