Gravitational Behaviour of Antihydrogen at Rest
E210175
Gravitational Behaviour of Antihydrogen at Rest is a physics experiment designed to precisely measure how antimatter, specifically antihydrogen atoms, responds to Earth's gravitational field.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gravitational Behaviour of Antihydrogen at Rest canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1889441 — 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: Gravitational Behaviour of Antihydrogen at Rest Context triple: [GBAR experiment, fullName, Gravitational Behaviour of Antihydrogen at Rest]
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A.
Muon g-2 experiment
The Muon g-2 experiment is a high-precision particle physics experiment that measures the anomalous magnetic moment of the muon to test the limits of the Standard Model and search for signs of new physics.
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B.
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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C.
AMS-02 experiment
The AMS-02 experiment is a state-of-the-art particle physics detector mounted on the International Space Station to study cosmic rays and search for dark matter and antimatter in space.
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D.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
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E.
Hafele–Keating experiment
The Hafele–Keating experiment was a 1971 test of Einstein’s theory of relativity in which atomic clocks were flown around the world on commercial airliners and compared with stationary clocks to measure time dilation effects.
- 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: Gravitational Behaviour of Antihydrogen at Rest Target entity description: Gravitational Behaviour of Antihydrogen at Rest is a physics experiment designed to precisely measure how antimatter, specifically antihydrogen atoms, responds to Earth's gravitational field.
-
A.
Muon g-2 experiment
The Muon g-2 experiment is a high-precision particle physics experiment that measures the anomalous magnetic moment of the muon to test the limits of the Standard Model and search for signs of new physics.
-
B.
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.
-
C.
AMS-02 experiment
The AMS-02 experiment is a state-of-the-art particle physics detector mounted on the International Space Station to study cosmic rays and search for dark matter and antimatter in space.
-
D.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
-
E.
Hafele–Keating experiment
The Hafele–Keating experiment was a 1971 test of Einstein’s theory of relativity in which atomic clocks were flown around the world on commercial airliners and compared with stationary clocks to measure time dilation effects.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
antimatter gravity experiment
ⓘ
fundamental physics experiment ⓘ physics experiment ⓘ |
| aimsTo |
constrain possible deviations from standard gravity for antimatter
ⓘ
obtain a direct measurement of the gravitational mass of antihydrogen ⓘ provide experimental input to theories of matter–antimatter asymmetry ⓘ |
| characterizedBy |
antihydrogen initially at rest or near rest
ⓘ
high-precision tracking of annihilation positions ⓘ observation of free-fall trajectories ⓘ |
| contributesTo |
constraints on alternative theories of gravity
ⓘ
tests of fundamental symmetries involving antimatter ⓘ understanding of gravity at the quantum scale ⓘ |
| focusesOn |
Earth’s gravitational field
ⓘ
antihydrogen atoms ⓘ antimatter ⓘ |
| hasGoal |
compare gravitational behaviour of matter and antimatter
ⓘ
determine whether antihydrogen falls down or up in Earth’s gravitational field ⓘ measure gravitational acceleration of antihydrogen at rest ⓘ test the weak equivalence principle with antimatter ⓘ |
| investigates |
possible anomalous gravitational behaviour of antimatter
ⓘ
whether gravitational acceleration of antihydrogen equals that of hydrogen ⓘ |
| measures |
effective gravitational acceleration of antihydrogen
ⓘ
vertical motion of antihydrogen at low kinetic energy ⓘ |
| relatedTo |
antimatter research
ⓘ
equivalence principle tests ⓘ precision measurements in fundamental physics ⓘ quantum systems in gravitational fields ⓘ |
| requires |
control of electromagnetic fields
ⓘ
minimization of systematic effects on antihydrogen motion ⓘ production of cold antihydrogen ⓘ |
| studies |
free-fall motion of antihydrogen atoms
ⓘ
gravitational interaction of antihydrogen with Earth ⓘ sign and magnitude of gravitational acceleration of antihydrogen ⓘ |
| tests |
CPT symmetry implications for gravity
ⓘ
equivalence between inertial and gravitational mass for antihydrogen ⓘ general relativity with antimatter ⓘ |
| uses |
magnetic confinement of antihydrogen
ⓘ
precision position and time measurements ⓘ trapped antihydrogen atoms ⓘ ultra-high vacuum environment ⓘ |
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: Gravitational Behaviour of Antihydrogen at Rest Description of subject: Gravitational Behaviour of Antihydrogen at Rest is a physics experiment designed to precisely measure how antimatter, specifically antihydrogen atoms, responds to Earth's gravitational field.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.