LEP
E24275
LEP (Large Electron–Positron Collider) was a major circular particle accelerator at CERN used to study electroweak interactions and precisely measure properties of particles like the Z boson.
All labels observed (5)
| Label | Occurrences |
|---|---|
| LEP canonical | 3 |
| LEP1 | 3 |
| LEP2 | 3 |
| LEP experiments | 2 |
| LEP2 program | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T192788 — 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: LEP Context triple: [Z boson, measuredAt, LEP]
-
A.
LCC
LCC is a comprehensive library classification system developed by the Library of Congress to organize and arrange books and other materials by subject.
-
B.
LHCf
LHCf is a CERN experiment at the Large Hadron Collider that studies forward particles produced in proton–proton collisions to improve our understanding of ultra-high-energy cosmic rays.
-
C.
LPC
The LPC is New York City’s official agency responsible for identifying, designating, and regulating the city’s landmarks and historic districts.
-
D.
ATLAS
ATLAS is a major particle physics experiment and detector at the Large Hadron Collider that investigates fundamental particles and forces, including the Higgs boson.
-
E.
LHCb
LHCb is a particle physics experiment at the Large Hadron Collider focused on studying the differences between matter and antimatter through precise measurements of beauty and charm quark decays.
- 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: LEP Target entity description: LEP (Large Electron–Positron Collider) was a major circular particle accelerator at CERN used to study electroweak interactions and precisely measure properties of particles like the Z boson.
-
A.
LCC
LCC is a comprehensive library classification system developed by the Library of Congress to organize and arrange books and other materials by subject.
-
B.
LHCf
LHCf is a CERN experiment at the Large Hadron Collider that studies forward particles produced in proton–proton collisions to improve our understanding of ultra-high-energy cosmic rays.
-
C.
LPC
The LPC is New York City’s official agency responsible for identifying, designating, and regulating the city’s landmarks and historic districts.
-
D.
ATLAS
ATLAS is a major particle physics experiment and detector at the Large Hadron Collider that investigates fundamental particles and forces, including the Higgs boson.
-
E.
LHCb
LHCb is a particle physics experiment at the Large Hadron Collider focused on studying the differences between matter and antimatter through precise measurements of beauty and charm quark decays.
- F. None of above. chosen
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
circular accelerator
ⓘ
collider ⓘ electron–positron collider ⓘ particle accelerator ⓘ |
| abbreviation | LEP ⓘ |
| beamType |
electron
ⓘ
positron ⓘ |
| builtInTunnel | LHC tunnel ⓘ |
| collisionType | electron–positron ⓘ |
| constructionStartDate | 1983 ⓘ |
| country | Switzerland ⓘ |
| decommissioningDate | 2000 ⓘ |
| energyRegime |
W-pair threshold
ⓘ
Z-pole ⓘ |
| firstBeamDate | 1989 ⓘ |
| fullName | Large Electron–Positron Collider ⓘ |
| fundingBody | CERN member states ⓘ |
| hostedExperiment |
ALEPH
ⓘ
DELPHI ⓘ
linked to:
Delphi
L3 ⓘ OPAL ⓘ |
| hostLaboratory | CERN ⓘ |
| LEP1EnergyRange | around 91 GeV centre-of-mass ⓘ |
| LEP2EnergyRange | up to about 209 GeV centre-of-mass ⓘ |
| locatedIn |
CERN
ⓘ
Geneva region ⓘ
linked to:
Geneva metropolitan area
Meyrin ⓘ Switzerland ⓘ |
| locatedNear |
French–Swiss border
ⓘ
linked to:
France–Switzerland border
|
| maximumCentreOfMassEnergy | around 209 GeV ⓘ |
| measuredNumberOfLightNeutrinoFamilies | about 3 ⓘ |
| numberOfMainDetectors | 4 ⓘ |
| operationEndDate | 2000 ⓘ |
| operationStartDate | 1989 ⓘ |
| partiallyInCountry | France ⓘ |
| phase |
LEP1
ⓘ
LEP2 ⓘ
linked to:
LEP
|
| predecessor | SPS ⓘ |
| primaryPhysicsGoal |
precision measurements of W boson properties
ⓘ
precision measurements of Z boson properties ⓘ study of electroweak interactions ⓘ tests of the Standard Model ⓘ |
| scientificContribution |
constraints on Higgs boson mass
ⓘ
constraints on number of light neutrino families ⓘ precision determination of W boson mass ⓘ precision determination of Z boson mass ⓘ precision determination of Z boson width ⓘ searches for new physics beyond the Standard Model ⓘ stringent tests of electroweak theory ⓘ |
| successor | Large Hadron Collider ⓘ |
| tunnelCircumference |
27 kilometres
ⓘ
about 17 miles ⓘ |
| tunnelDepth | about 100 metres underground ⓘ |
| tunnelReusedBy |
LHC
ⓘ
linked to:
Large Hadron Collider
|
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: LEP Description of subject: LEP (Large Electron–Positron Collider) was a major circular particle accelerator at CERN used to study electroweak interactions and precisely measure properties of particles like the Z boson.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: LEP
linked to: LEP
linked to: LEP
linked to: LEP
linked to: LEP
linked to: LEP
linked to: LEP