Xi- baryon
E676228
The Xi- baryon is a negatively charged strange baryon composed of one down quark and two strange quarks, playing a key role in studies of hyperon structure and weak decays.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Xi- baryon canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7600550 — 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: Xi- baryon Context triple: [Omega minus baryon, decayProductExamples, Xi- baryon]
-
A.
Lambda baryon
The Lambda baryon is a neutral strange baryon composed of up, down, and strange quarks, notable for its role in studying weak interactions and hadron structure in particle physics.
-
B.
anti-Omega plus baryon
The anti-Omega plus baryon is the antimatter counterpart of the Omega minus baryon, composed of three anti-strange quarks and carrying opposite quantum numbers such as positive electric charge and baryon number −1.
-
C.
Quark
Quark is a Ferengi bartender and shrewd businessman on the space station Deep Space Nine in the Star Trek universe.
-
D.
Quark
Quark is an Italian popular science television program created and hosted by Piero Angela that explains scientific and technological topics to a general audience.
-
E.
baryon decuplet
The baryon decuplet is a group of ten spin-3/2 baryons organized by flavor symmetry in the quark model, including particles such as the Δ, Σ*, Ξ*, and Ω⁻.
- 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: Xi- baryon Target entity description: The Xi- baryon is a negatively charged strange baryon composed of one down quark and two strange quarks, playing a key role in studies of hyperon structure and weak decays.
-
A.
Lambda baryon
The Lambda baryon is a neutral strange baryon composed of up, down, and strange quarks, notable for its role in studying weak interactions and hadron structure in particle physics.
-
B.
anti-Omega plus baryon
The anti-Omega plus baryon is the antimatter counterpart of the Omega minus baryon, composed of three anti-strange quarks and carrying opposite quantum numbers such as positive electric charge and baryon number −1.
-
C.
Quark
Quark is a Ferengi bartender and shrewd businessman on the space station Deep Space Nine in the Star Trek universe.
-
D.
Quark
Quark is an Italian popular science television program created and hosted by Piero Angela that explains scientific and technological topics to a general audience.
-
E.
baryon decuplet
The baryon decuplet is a group of ten spin-3/2 baryons organized by flavor symmetry in the quark model, including particles such as the Δ, Σ*, Ξ*, and Ω⁻.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
baryon
ⓘ
hyperon ⓘ |
| belongsToMultiplet | baryon octet NERFINISHED ⓘ |
| decaysVia | weak decay ⓘ |
| hasAlternativeName |
Xi minus
NERFINISHED
ⓘ
Xi- hyperon NERFINISHED ⓘ cascade minus NERFINISHED ⓘ |
| hasBaryonNumber | +1 ⓘ |
| hasChargeConjugate | Xi+ baryon NERFINISHED ⓘ |
| hasCParity | not defined ⓘ |
| hasDiscoveryYear | 1959 ⓘ |
| hasDownQuarkCount | 1 ⓘ |
| hasElectricCharge | -1 e ⓘ |
| hasFamily | Xi baryons NERFINISHED ⓘ |
| hasGParity | not defined ⓘ |
| hasHeavierExcitedStates | Ξ(1530) ⓘ |
| hasIsospin | 1/2 ⓘ |
| hasIsospinProjection | -1/2 ⓘ |
| hasLifetime | approximately 1.64e-10 s ⓘ |
| hasParity | +1 ⓘ |
| hasPDGParticleID | 3312 ⓘ |
| hasPrimaryDecayMode | Λ0 + π- ⓘ |
| hasQuark |
down quark
ⓘ
strange quark ⓘ |
| hasQuarkContent | dss NERFINISHED ⓘ |
| hasRestMass | approximately 1321 MeV/c^2 ⓘ |
| hasRoleIn |
studies of hyperon structure
ⓘ
studies of weak decays ⓘ |
| hasSecondaryDecayChain | Λ0 → p + π- ⓘ |
| hasSpin | 1/2 ⓘ |
| hasStrangeness | -2 ⓘ |
| hasStrangeQuarkCount | 2 ⓘ |
| hasSymbol | Ξ- NERFINISHED ⓘ |
| isColorCharged | true ⓘ |
| isComposedOf | three valence quarks ⓘ |
| isFermion | true ⓘ |
| isGroundStateOf | Xi- family ⓘ |
| isStudiedIn |
hadron spectroscopy
ⓘ
particle physics ⓘ |
| isSubjectOf | hyperon decay experiments ⓘ |
| isUsedToTest |
CP symmetry in baryon decays
ⓘ
flavor SU(3) symmetry ⓘ |
| participatesInInteraction |
electromagnetic interaction
ⓘ
strong interaction ⓘ weak interaction ⓘ |
| wasDiscoveredAt | Brookhaven National Laboratory NERFINISHED ⓘ |
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: Xi- baryon Description of subject: The Xi- baryon is a negatively charged strange baryon composed of one down quark and two strange quarks, playing a key role in studies of hyperon structure and weak decays.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.