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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| neutral kaon mixing canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5766897 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
Target entity: neutral kaon mixing Context triple: [K-short, playsRoleIn, neutral kaon mixing]
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A.
Cabibbo–Kobayashi–Maskawa matrix
The Cabibbo–Kobayashi–Maskawa matrix is a fundamental component of the Standard Model of particle physics that describes how quarks change flavor via the weak interaction and accounts for CP violation in the quark sector.
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B.
K+ (charged kaon)
K⁺ (charged kaon) is a positively charged meson containing an up quark and an anti-strange quark, notable for its role in probing weak interactions and testing the Standard Model through rare decay processes.
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C.
neutrino oscillation
Neutrino oscillation is a quantum phenomenon in which neutrinos change from one flavor type to another as they travel, implying that they have mass and mix between flavor states.
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D.
Kobayashi–Maskawa theory
The Kobayashi–Maskawa theory is a fundamental framework in particle physics that explains CP violation in the Standard Model through a three-generation quark mixing matrix (the CKM matrix).
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E.
Neutrino
A neutrino is an extremely light, electrically neutral elementary particle that interacts only via the weak nuclear force and gravity, making it very difficult to detect.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: neutral kaon mixing Target entity description: 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.
-
A.
Cabibbo–Kobayashi–Maskawa matrix
The Cabibbo–Kobayashi–Maskawa matrix is a fundamental component of the Standard Model of particle physics that describes how quarks change flavor via the weak interaction and accounts for CP violation in the quark sector.
-
B.
K+ (charged kaon)
K⁺ (charged kaon) is a positively charged meson containing an up quark and an anti-strange quark, notable for its role in probing weak interactions and testing the Standard Model through rare decay processes.
-
C.
neutrino oscillation
Neutrino oscillation is a quantum phenomenon in which neutrinos change from one flavor type to another as they travel, implying that they have mass and mix between flavor states.
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D.
Kobayashi–Maskawa theory
The Kobayashi–Maskawa theory is a fundamental framework in particle physics that explains CP violation in the Standard Model through a three-generation quark mixing matrix (the CKM matrix).
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E.
Neutrino
A neutrino is an extremely light, electrically neutral elementary particle that interacts only via the weak nuclear force and gravity, making it very difficult to detect.
- F. None of above. chosen
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 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Subject: neutral kaon mixing Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.