ALPHA experiment
E41831
The ALPHA experiment is a CERN-based research project that studies antihydrogen atoms to test fundamental symmetries between matter and antimatter.
All labels observed (3)
| Label | Occurrences |
|---|---|
| ALPHA experiment canonical | 10 |
| ALPHA collaboration | 1 |
| ATHENA experiment | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T327803 — 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: ALPHA experiment Context triple: [Antiproton Decelerator, providesBeamTo, ALPHA 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.
-
C.
Project Alpha
Project Alpha was a famous early-1980s hoax experiment in which teenage magicians, backed by skeptic James Randi, infiltrated a parapsychology lab to expose its poor scientific controls and challenge claims of psychic phenomena.
-
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.
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.
- 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: ALPHA experiment Target entity description: The ALPHA experiment is a CERN-based research project that studies antihydrogen atoms to test fundamental symmetries between matter and 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.
Project Alpha
Project Alpha was a famous early-1980s hoax experiment in which teenage magicians, backed by skeptic James Randi, infiltrated a parapsychology lab to expose its poor scientific controls and challenge claims of psychic phenomena.
-
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.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
CERN experiment
ⓘ
antimatter experiment ⓘ particle physics experiment ⓘ physics experiment ⓘ |
| abbreviationOf | Antihydrogen Laser Physics Apparatus ⓘ |
| aimsTo |
compare hydrogen and antihydrogen
ⓘ
test fundamental symmetries between matter and antimatter ⓘ |
| collaborationSize | international collaboration ⓘ |
| country | Switzerland ⓘ |
| dataType | experimental data on antihydrogen properties ⓘ |
| focusesOn |
precision tests of the Standard Model
ⓘ
search for physics beyond the Standard Model using antimatter ⓘ |
| fundingSource | international funding agencies ⓘ |
| hostOrganization |
European Organization for Nuclear Research
ⓘ
linked to:
CERN
|
| infrastructure |
cryogenic apparatus
ⓘ
silicon vertex detector ⓘ superconducting magnets ⓘ |
| location |
Antiproton Decelerator
ⓘ
CERN ⓘ |
| measures |
1S–2S transition in antihydrogen
ⓘ
antihydrogen spectral lines ⓘ gravitational behavior of antihydrogen ⓘ hyperfine structure of antihydrogen ⓘ |
| notableResult |
constraints on CPT violation in the hydrogen–antihydrogen system
ⓘ
first trapped antihydrogen atoms for long durations ⓘ precision spectroscopy of antihydrogen ⓘ |
| operatedBy |
ALPHA collaboration
ⓘ
linked to:
ALPHA experiment
|
| partOf |
CERN Antiproton Decelerator program
ⓘ
linked to:
Antiproton Decelerator
|
| predecessor |
ATHENA experiment
ⓘ
linked to:
ATRAP experiment
|
| produces | cold antihydrogen atoms ⓘ |
| relatedTo |
AEgIS experiment
ⓘ
ATRAP experiment ⓘ GBAR experiment ⓘ |
| researchField |
atomic physics
ⓘ
fundamental symmetries ⓘ particle physics ⓘ |
| startDate | 2000s ⓘ |
| studies |
antihydrogen
ⓘ
antimatter ⓘ |
| tests |
CPT symmetry
ⓘ
charge-parity-time reversal symmetry ⓘ matter–antimatter symmetry ⓘ weak equivalence principle for antimatter ⓘ |
| uses |
Penning trap
ⓘ
antiprotons ⓘ magnetic minimum neutral atom trap ⓘ magnetic traps ⓘ 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: ALPHA experiment Description of subject: The ALPHA experiment is a CERN-based research project that studies antihydrogen atoms to test fundamental symmetries between matter and antimatter.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: ALPHA experiment