GBAR
E210176
GBAR is a physics experiment at CERN designed to produce and study ultra-cold antihydrogen atoms in order to precisely test how antimatter behaves in Earth's gravitational field.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GBAR canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1889442 — 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 Context triple: [GBAR experiment, acronym, GBAR]
-
A.
GAB
GAB is the three-letter ISO 3166-1 alpha-3 country code assigned to Gabon.
-
B.
BG
BG is the two-letter ISO 3166-1 alpha-2 country code representing Bulgaria.
-
C.
Barcha
Barcha is the surname of Mercedes Barcha, the Colombian wife and lifelong companion of Nobel Prize–winning author Gabriel García Márquez.
-
D.
BGer
BGer is the commonly used German abbreviation for the Federal Supreme Court of Switzerland, the country's highest judicial authority.
-
E.
Gra
Gra, an acronym for the Vilna Gaon (Rabbi Elijah ben Solomon Zalman), was an 18th-century Lithuanian Jewish sage renowned for his profound Talmudic, halachic, and Kabbalistic scholarship.
- 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 Target entity description: GBAR is a physics experiment at CERN designed to produce and study ultra-cold antihydrogen atoms in order to precisely test how antimatter behaves in Earth's gravitational field.
-
A.
GAB
GAB is the three-letter ISO 3166-1 alpha-3 country code assigned to Gabon.
-
B.
BG
BG is the two-letter ISO 3166-1 alpha-2 country code representing Bulgaria.
-
C.
Barcha
Barcha is the surname of Mercedes Barcha, the Colombian wife and lifelong companion of Nobel Prize–winning author Gabriel García Márquez.
-
D.
BGer
BGer is the commonly used German abbreviation for the Federal Supreme Court of Switzerland, the country's highest judicial authority.
-
E.
Gra
Gra, an acronym for the Vilna Gaon (Rabbi Elijah ben Solomon Zalman), was an 18th-century Lithuanian Jewish sage renowned for his profound Talmudic, halachic, and Kabbalistic scholarship.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
antimatter experiment
ⓘ
physics experiment ⓘ |
| acronymFor | Gravitational Behaviour of Antihydrogen at Rest ⓘ |
| aimsTo |
measure the free-fall acceleration of antihydrogen
ⓘ
produce antihydrogen at microkelvin temperatures ⓘ |
| approvedBy | CERN Research Board ⓘ |
| collaborationType | international collaboration ⓘ |
| country | Switzerland ⓘ |
| designedTo | compare gravitational acceleration of antimatter with that of ordinary matter ⓘ |
| fullName | Gravitational Behaviour of Antihydrogen at Rest ⓘ |
| hasDetectorType | position-sensitive detector for annihilation products ⓘ |
| hasMeasurementQuantity | gravitational acceleration of antihydrogen ḡ ⓘ |
| hostInstitution | CERN ⓘ |
| infrastructure | beamline from CERN Antiproton Decelerator complex ⓘ |
| involves | production of antihydrogen by neutralizing antihydrogen ions ⓘ |
| keyTechnique |
production of antihydrogen ions via positronium–antiproton interactions
ⓘ
sympathetic cooling of antihydrogen ions with laser-cooled ions ⓘ |
| locatedIn | CERN ⓘ |
| measurementMethod | time-of-flight free-fall of antihydrogen ⓘ |
| organizationType | CERN experiment ⓘ |
| primaryGoal |
measure the effect of Earth’s gravitational field on antihydrogen
ⓘ
test the weak equivalence principle with antimatter ⓘ |
| receivesAntiprotonsFrom |
Antiproton Decelerator
ⓘ
ELENA ring ⓘ |
| relatedExperiment |
AEgIS
ⓘ
ALPHA ⓘ ASACUSA ⓘ
linked to:
ASACUSA experiment
ATRAP ⓘ |
| researchField |
antimatter physics
ⓘ
fundamental physics ⓘ gravitation ⓘ particle physics ⓘ |
| scientificMotivation |
probe possible differences between matter and antimatter in gravity
ⓘ
search for deviations from general relativity for antimatter ⓘ |
| status | under development ⓘ |
| studies |
antihydrogen
ⓘ
ultra-cold antihydrogen atoms ⓘ |
| temperatureRegime | ultra-cold ⓘ |
| tests |
CPT symmetry implications in gravitation
ⓘ
equivalence principle ⓘ |
| timeScale | 21st century experiment ⓘ |
| uses |
antihydrogen ions
ⓘ
antiprotons ⓘ free-fall measurement ⓘ ion trapping ⓘ laser cooling ⓘ positronium ⓘ positrons ⓘ |
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 Description of subject: GBAR is a physics experiment at CERN designed to produce and study ultra-cold antihydrogen atoms in order to precisely test how antimatter behaves in Earth's gravitational field.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.