Neutrino
E400607
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.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T3921354 — 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.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Neutrino Context triple: [Fermion, includes, Neutrino]
-
A.
tau neutrino
The tau neutrino is a fundamental, electrically neutral lepton associated with the tau particle, interacting only via the weak force and gravity and playing a key role in neutrino oscillations.
-
B.
electron neutrino
The electron neutrino is a nearly massless, electrically neutral elementary particle associated with the electron, produced in weak nuclear processes such as beta decay and nuclear fusion in stars.
-
C.
neutrino hypothesis
The neutrino hypothesis is Wolfgang Pauli’s 1930 proposal of a neutral, nearly massless particle to explain missing energy and momentum in beta decay, laying the groundwork for the discovery of the neutrino.
-
D.
muon neutrino
The muon neutrino is a fundamental, electrically neutral lepton in the Standard Model associated with the muon, interacting only via the weak force and gravity.
-
E.
W boson
The W boson is a massive elementary particle that mediates the weak nuclear force and is responsible for processes like beta decay in the Standard Model of particle physics.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Neutrino Target entity description: 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.
-
A.
tau neutrino
The tau neutrino is a fundamental, electrically neutral lepton associated with the tau particle, interacting only via the weak force and gravity and playing a key role in neutrino oscillations.
-
B.
electron neutrino
The electron neutrino is a nearly massless, electrically neutral elementary particle associated with the electron, produced in weak nuclear processes such as beta decay and nuclear fusion in stars.
-
C.
neutrino hypothesis
The neutrino hypothesis is Wolfgang Pauli’s 1930 proposal of a neutral, nearly massless particle to explain missing energy and momentum in beta decay, laying the groundwork for the discovery of the neutrino.
-
D.
muon neutrino
The muon neutrino is a fundamental, electrically neutral lepton in the Standard Model associated with the muon, interacting only via the weak force and gravity.
-
E.
W boson
The W boson is a massive elementary particle that mediates the weak nuclear force and is responsible for processes like beta decay in the Standard Model of particle physics.
- F. None of above. chosen
Statements (57)
| Predicate | Object |
|---|---|
| instanceOf |
Elementary particle
ⓘ
Fermion ⓘ Lepton ⓘ |
| antiparticleType | Right-handed (for antineutrinos) ⓘ |
| belongsToGeneration |
First generation (electron neutrino)
ⓘ
Second generation (muon neutrino) ⓘ Third generation (tau neutrino) ⓘ |
| conserves | Total lepton number (in Standard Model processes) ⓘ |
| detectionMethod |
Cherenkov radiation in large volumes of water or ice
ⓘ
Time Projection Chamber ⓘ
surface form:
Liquid argon time projection chambers
Scintillation detectors ⓘ |
| firstDetectionSource | Nuclear reactor ⓘ |
| firstDetectionYear | 1956 ⓘ |
| hasAntiparticle |
electron antineutrino
ⓘ
surface form:
Antineutrino
|
| hasChirality | Left-handed (active neutrinos) ⓘ |
| hasElectricCharge | 0 ⓘ |
| hasFlavor |
electron neutrino
ⓘ
surface form:
Electron neutrino
muon neutrino ⓘ
surface form:
Muon neutrino
Tau neutrino ⓘ |
| hasRestMass | Nonzero but very small ⓘ |
| hasRestMassUpperBound | Less than 1 eV/c^2 (per flavor) ⓘ |
| hasSpin | 1/2 ⓘ |
| interactsVia |
Gravity
ⓘ
Weak nuclear force ⓘ |
| isComponentOf |
Standard Model
ⓘ
surface form:
Standard Model of particle physics
|
| isProducedIn |
Beta decay
ⓘ
Big Bang relic background ⓘ Cosmic ray interactions in the atmosphere ⓘ Nuclear reactors ⓘ Other stars ⓘ Particle accelerators ⓘ Supernovae ⓘ The Sun ⓘ |
| isStudiedIn |
Atmospheric neutrino experiments
ⓘ
IceCube Neutrino Observatory ⓘ
surface form:
High-energy astrophysical neutrino observatories
Long-baseline accelerator experiments ⓘ Neutrino oscillation experiments ⓘ Reactor neutrino experiments ⓘ Solar neutrino experiments ⓘ |
| mayBe |
Dirac particle
ⓘ
Majorana fermion ⓘ
surface form:
Majorana particle
|
| nameMeaning | “Little neutral one” in Italian ⓘ |
| openQuestion |
Absolute neutrino mass scale
ⓘ
CP violation in the lepton sector ⓘ Dirac vs Majorana nature ⓘ Mass ordering (normal vs inverted hierarchy) ⓘ |
| penetrationProperty | Can pass through light-years of lead with low interaction probability ⓘ |
| proposalYear | 1930 ⓘ |
| rarelyInteractsVia | Other forces ⓘ |
| roleInAstrophysics | Carries away energy from supernovae core collapse ⓘ |
| roleInUniverse | Influences evolution of the early universe ⓘ |
| undergoes |
neutrino oscillation
ⓘ
surface form:
Neutrino oscillation
|
| violates | Lepton flavor conservation (individually) ⓘ |
| wasFirstDetectedBy |
Clyde Cowan
ⓘ
Clyde Cowan ⓘ
surface form:
Frederick Reines
|
| wasNamedBy | Enrico Fermi ⓘ |
| wasProposedBy | Wolfgang Pauli ⓘ |
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.
Instruction
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.
Input
Subject: Neutrino Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.