GBAR experiment
E41835
The GBAR experiment is a physics research project at CERN designed to study the behavior of antihydrogen in Earth's gravitational field to test the equivalence principle with antimatter.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GBAR experiment canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T327808 — 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: GBAR experiment Context triple: [Antiproton Decelerator, providesBeamTo, GBAR experiment]
-
A.
UA1 experiment
The UA1 experiment was a high-energy physics collaboration at CERN’s Super Proton Synchrotron that became famous for providing the first experimental evidence of the W and Z bosons, key carriers of the weak nuclear force.
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B.
UA2 experiment
The UA2 experiment was a high-energy physics collaboration at CERN’s Super Proton Synchrotron that played a key role in confirming the existence and properties of the W boson.
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C.
A Large Ion Collider Experiment
A Large Ion Collider Experiment (ALICE) is a major detector at CERN’s Large Hadron Collider designed to study the physics of strongly interacting matter and quark–gluon plasma created in high-energy heavy-ion collisions.
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D.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
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E.
FASER
FASER is a forward physics experiment at CERN’s Large Hadron Collider designed to search for light, weakly interacting particles and study high-energy neutrinos produced in proton–proton collisions.
- 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: GBAR experiment Target entity description: The GBAR experiment is a physics research project at CERN designed to study the behavior of antihydrogen in Earth's gravitational field to test the equivalence principle with antimatter.
-
A.
UA1 experiment
The UA1 experiment was a high-energy physics collaboration at CERN’s Super Proton Synchrotron that became famous for providing the first experimental evidence of the W and Z bosons, key carriers of the weak nuclear force.
-
B.
UA2 experiment
The UA2 experiment was a high-energy physics collaboration at CERN’s Super Proton Synchrotron that played a key role in confirming the existence and properties of the W boson.
-
C.
A Large Ion Collider Experiment
A Large Ion Collider Experiment (ALICE) is a major detector at CERN’s Large Hadron Collider designed to study the physics of strongly interacting matter and quark–gluon plasma created in high-energy heavy-ion collisions.
-
D.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
-
E.
FASER
FASER is a forward physics experiment at CERN’s Large Hadron Collider designed to search for light, weakly interacting particles and study high-energy neutrinos produced in proton–proton collisions.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
CERN experiment
ⓘ
antimatter experiment ⓘ gravitational experiment ⓘ physics experiment ⓘ |
| acronym | GBAR ⓘ |
| aimsToDetermine |
magnitude of the gravitational acceleration of antihydrogen
ⓘ
sign of the gravitational acceleration of antihydrogen ⓘ |
| collaborationType | international collaboration ⓘ |
| countryOfHostInstitution | Switzerland ⓘ |
| fullName | Gravitational Behaviour of Antihydrogen at Rest ⓘ |
| hasEnvironment |
cryogenic conditions
ⓘ
ultra-high vacuum ⓘ |
| hostedAt |
Antiproton Decelerator
ⓘ
ELENA ring ⓘ |
| locatedIn |
CERN
ⓘ
Geneva ⓘ Switzerland ⓘ |
| measuresQuantity |
free-fall time of antihydrogen
ⓘ
gravitational acceleration of antihydrogen ⓘ |
| proposalDate | early 2010s ⓘ |
| relatedTo |
AEgIS experiment
ⓘ
ALPHA experiment ⓘ ATRAP experiment ⓘ BASE experiment ⓘ |
| researchField |
antimatter physics
ⓘ
gravitation ⓘ particle physics ⓘ |
| researchObjective |
to measure the free-fall acceleration of antihydrogen
ⓘ
to study the behavior of antihydrogen in Earth’s gravitational field ⓘ to test the weak equivalence principle with antimatter ⓘ |
| sponsor | CERN ⓘ |
| startDate | 2010s ⓘ |
| status |
data-taking preparation
ⓘ
under development ⓘ |
| testsPrinciple |
equivalence principle
ⓘ
weak equivalence principle ⓘ |
| testsTheory |
CPT symmetry
ⓘ
general relativity with antimatter ⓘ |
| usesFacility |
Antiproton Decelerator
ⓘ
ELENA ⓘ |
| usesModel | general relativity ⓘ |
| usesParticle |
antihydrogen
ⓘ
antiproton ⓘ positron ⓘ |
| usesTechnique |
antihydrogen ion production
ⓘ
laser cooling ⓘ time-of-flight measurement ⓘ trapping of charged particles ⓘ ultracold antihydrogen production ⓘ |
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: GBAR experiment Description of subject: The GBAR experiment is a physics research project at CERN designed to study the behavior of antihydrogen in Earth's gravitational field to test the equivalence principle with antimatter.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.