g-2
E373838
g-2 is the anomalous magnetic moment of the muon, a precision-measured quantity that tests the Standard Model of particle physics and probes potential new physics.
All labels observed (1)
| Label | Occurrences |
|---|---|
| g-2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3616149 — 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: g-2 Context triple: [Muon g-2 experiment, symbol, g-2]
-
A.
G-2
G-2 is the U.S. Army staff designation for the senior intelligence officer responsible for overseeing military intelligence activities and analysis.
-
B.
gauss
The gauss is a unit of magnetic flux density in the centimeter–gram–second (CGS) system, commonly used in physics to measure the strength of magnetic fields.
-
C.
G3
G3 is the IATA airline designator assigned to the Brazilian low-cost carrier GOL Linhas Aéreas Inteligentes.
-
D.
G22
G22 is BMW’s internal model designation for the second-generation 4 Series coupe, introduced with updated styling, technology, and performance over its predecessor.
-
E.
gon
gon is the ISO 639-3 code for the Gondi language, a Dravidian language spoken by the Gond people in central India.
- 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: g-2 Target entity description: g-2 is the anomalous magnetic moment of the muon, a precision-measured quantity that tests the Standard Model of particle physics and probes potential new physics.
-
A.
G-2
G-2 is the U.S. Army staff designation for the senior intelligence officer responsible for overseeing military intelligence activities and analysis.
-
B.
gauss
The gauss is a unit of magnetic flux density in the centimeter–gram–second (CGS) system, commonly used in physics to measure the strength of magnetic fields.
-
C.
G3
G3 is the IATA airline designator assigned to the Brazilian low-cost carrier GOL Linhas Aéreas Inteligentes.
-
D.
G22
G22 is BMW’s internal model designation for the second-generation 4 Series coupe, introduced with updated styling, technology, and performance over its predecessor.
-
E.
gon
gon is the ISO 639-3 code for the Gondi language, a Dravidian language spoken by the Gond people in central India.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
anomalous magnetic moment
ⓘ
physical observable ⓘ precision test of the Standard Model ⓘ |
| comparedWith | Standard Model prediction ⓘ |
| constrains |
extended Higgs sector models
ⓘ
lepton-flavor-universal new interactions ⓘ models with light dark photons ⓘ supersymmetry parameter space ⓘ |
| definedAs | (g_μ - 2)/2 ⓘ |
| dependsOn | gyromagnetic ratio of the muon ⓘ |
| hasContributionFrom |
electroweak loops
ⓘ
hadronic light-by-light scattering ⓘ hadronic vacuum polarization ⓘ |
| hasDiscrepancyWith | some Standard Model calculations ⓘ |
| hasLeadingContributionFrom | quantum electrodynamics ⓘ |
| hasQuantityType | dimensionless ⓘ |
| hasRoleIn |
precision frontier of particle physics
ⓘ
tests of lepton universality ⓘ |
| measuredAt |
Brookhaven E821 experiment
ⓘ
Muon g-2 experiment ⓘ
surface form:
Fermilab Muon g-2 experiment
|
| measuredFor | muon ⓘ |
| measuredUsing |
spin precession frequency of muons
ⓘ
storage ring technique ⓘ |
| motivated |
improved hadronic cross-section measurements
ⓘ
lattice QCD calculations of hadronic contributions ⓘ new physics model building ⓘ |
| probes |
electroweak interactions
ⓘ
quantum chromodynamics ⓘ quantum electrodynamics ⓘ |
| refersTo | anomalous magnetic moment of the muon ⓘ |
| relatedTo |
electron anomalous magnetic moment
ⓘ
magnetic dipole moment of the muon ⓘ tau anomalous magnetic moment ⓘ |
| sensitiveTo |
axion-like particles
ⓘ
dark sector particles ⓘ heavy Z′ bosons ⓘ leptoquarks ⓘ physics beyond the Standard Model ⓘ supersymmetric particles ⓘ virtual particle loops ⓘ |
| symbolOf | a_μ ⓘ |
| testsTheory |
Standard Model
ⓘ
surface form:
Standard Model of particle physics
|
| usedAs |
indirect probe of new physics mass scales
ⓘ
precision test of electroweak theory ⓘ precision test of hadronic effects ⓘ precision test of quantum electrodynamics ⓘ |
| usedIn | global fits of particle physics models ⓘ |
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: g-2 Description of subject: g-2 is the anomalous magnetic moment of the muon, a precision-measured quantity that tests the Standard Model of particle physics and probes potential new physics.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.