V_tb
E815594
V_tb is the element of the CKM quark-mixing matrix that quantifies the strength of the weak interaction coupling between the top quark and the bottom quark.
All labels observed (1)
| Label | Occurrences |
|---|---|
| V_tb canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9689296 — 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: V_tb Context triple: [Cabibbo–Kobayashi–Maskawa matrix, hasElement, V_tb]
-
A.
VTBR
VTBR is the stock ticker symbol for VTB Bank, one of Russia’s largest state-controlled financial institutions.
-
B.
VAB
VAB is the commonly used abbreviation for NASA’s Vehicle Assembly Building, the massive structure at Kennedy Space Center where rockets are assembled before launch.
-
C.
VABO
VABO is the ICAO airport code assigned to Vadodara Airport in Gujarat, India.
-
D.
TB
TB is the standard abbreviation for the Tampa Bay Rays, a Major League Baseball team based in St. Petersburg, Florida.
-
E.
XVT
XVT is the IATA station code for Ventimiglia railway station, a key rail hub in the border town of Ventimiglia in northwestern Italy.
- 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: V_tb Target entity description: V_tb is the element of the CKM quark-mixing matrix that quantifies the strength of the weak interaction coupling between the top quark and the bottom quark.
-
A.
VTBR
VTBR is the stock ticker symbol for VTB Bank, one of Russia’s largest state-controlled financial institutions.
-
B.
VAB
VAB is the commonly used abbreviation for NASA’s Vehicle Assembly Building, the massive structure at Kennedy Space Center where rockets are assembled before launch.
-
C.
VABO
VABO is the ICAO airport code assigned to Vadodara Airport in Gujarat, India.
-
D.
TB
TB is the standard abbreviation for the Tampa Bay Rays, a Major League Baseball team based in St. Petersburg, Florida.
-
E.
XVT
XVT is the IATA station code for Ventimiglia railway station, a key rail hub in the border town of Ventimiglia in northwestern Italy.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
CKM matrix element
ⓘ
complex number ⓘ |
| appearsIn |
Wtb vertex
ⓘ
charged current weak interactions ⓘ |
| belongsToColumn | third column of CKM matrix ⓘ |
| belongsToRow | third row of CKM matrix ⓘ |
| controls | branching ratio BR(t → W b) ⓘ |
| couplesQuarks |
bottom quark
ⓘ
top quark ⓘ |
| describes | weak interaction coupling between top and bottom quarks ⓘ |
| entersProcess |
associated tW production
ⓘ
pp → t b̄ + X ⓘ pp → t̄ b + X ⓘ single top s-channel production ⓘ single top t-channel production ⓘ |
| governs | t → W b decay amplitude ⓘ |
| hasApproximateMagnitude | 0.999 ⓘ |
| hasIndexNotation | V_{tb} ⓘ |
| hasMagnitudeConstraint |
|V_tb| > 0.97
ⓘ
|V_tb| ≈ 1 ⓘ |
| hasMagnitudeConstraintSource |
single top production measurements
ⓘ
top quark decay measurements ⓘ |
| hasPhase | CKM CP-violating phase dependent ⓘ |
| hasQuarkGenerationRelation | third-generation up-type to third-generation down-type ⓘ |
| isCloseTo | unitarity limit ⓘ |
| isConstrainedBy |
flavor physics data
ⓘ
global CKM fits ⓘ |
| isDominantElementIn |
third column of CKM matrix
ⓘ
third row of CKM matrix ⓘ |
| isLargestElementIn |
third column of CKM matrix
ⓘ
third row of CKM matrix ⓘ |
| isMeasuredAt |
LHC
ⓘ
linked to:
Large Hadron Collider
Tevatron ⓘ hadron colliders ⓘ |
| isMeasuredUsing |
single top quark production cross sections
ⓘ
top quark decay branching ratios ⓘ |
| isNearlyDiagonalElementOf |
CKM matrix
ⓘ
linked to:
Cabibbo–Kobayashi–Maskawa matrix
|
| isParameterOf |
Standard Model of particle physics
ⓘ
linked to:
Standard Model
electroweak sector ⓘ |
| isRelevantFor |
searches for new physics in top sector
ⓘ
tests of CKM unitarity ⓘ |
| partOf | Cabibbo–Kobayashi–Maskawa matrix ⓘ |
| relatesDownTypeQuark | bottom quark ⓘ |
| relatesUpTypeQuark | top quark ⓘ |
| satisfiesUnitarityConstraintWith |
V_td
ⓘ
V_ts ⓘ |
| symbolOf | V_tb element of CKM matrix ⓘ |
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: V_tb Description of subject: V_tb is the element of the CKM quark-mixing matrix that quantifies the strength of the weak interaction coupling between the top quark and the bottom quark.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.