Leptogenesis
E384755
Leptogenesis is a theoretical cosmological mechanism that explains the observed matter–antimatter asymmetry of the universe through an initial imbalance in leptons, later converted into a baryon asymmetry.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Leptogenesis canonical | 2 |
| B−L (baryon minus lepton) symmetry | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3727585 — 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: Leptogenesis Context triple: [Jubilees, hasTitle, Leptogenesis]
-
A.
Affleck–Dine baryogenesis scenarios
Affleck–Dine baryogenesis scenarios are theoretical models in cosmology and particle physics that explain the universe’s matter–antimatter asymmetry via the dynamics of scalar fields carrying baryon number in the early universe.
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B.
neutrino oscillation
Neutrino oscillation is a quantum phenomenon in which neutrinos change from one flavor type to another as they travel, implying that they have mass and mix between flavor states.
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C.
Kobayashi–Maskawa theory
The Kobayashi–Maskawa theory is a fundamental framework in particle physics that explains CP violation in the Standard Model through a three-generation quark mixing matrix (the CKM matrix).
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D.
Higgs mechanism
The Higgs mechanism is a process in particle physics that explains how fundamental particles acquire mass through their interaction with the Higgs field.
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E.
Salam–Weinberg model
The Salam–Weinberg model is the electroweak theory that unifies the electromagnetic and weak nuclear forces within the Standard Model of particle physics.
- 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: Leptogenesis Target entity description: Leptogenesis is a theoretical cosmological mechanism that explains the observed matter–antimatter asymmetry of the universe through an initial imbalance in leptons, later converted into a baryon asymmetry.
-
A.
Affleck–Dine baryogenesis scenarios
Affleck–Dine baryogenesis scenarios are theoretical models in cosmology and particle physics that explain the universe’s matter–antimatter asymmetry via the dynamics of scalar fields carrying baryon number in the early universe.
-
B.
neutrino oscillation
Neutrino oscillation is a quantum phenomenon in which neutrinos change from one flavor type to another as they travel, implying that they have mass and mix between flavor states.
-
C.
Kobayashi–Maskawa theory
The Kobayashi–Maskawa theory is a fundamental framework in particle physics that explains CP violation in the Standard Model through a three-generation quark mixing matrix (the CKM matrix).
-
D.
Higgs mechanism
The Higgs mechanism is a process in particle physics that explains how fundamental particles acquire mass through their interaction with the Higgs field.
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E.
Salam–Weinberg model
The Salam–Weinberg model is the electroweak theory that unifies the electromagnetic and weak nuclear forces within the Standard Model of particle physics.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
baryogenesis mechanism
ⓘ
lepton number generation mechanism ⓘ theoretical cosmology concept ⓘ |
| aimsToExplain |
baryon asymmetry of the universe
ⓘ
matter–antimatter asymmetry ⓘ |
| basedOn | lepton asymmetry ⓘ |
| constrainedBy |
baryon-to-photon ratio measurements
ⓘ
big bang nucleosynthesis ⓘ cosmic microwave background observations ⓘ |
| conversionMechanism | sphaleron processes ⓘ |
| converts | lepton asymmetry ⓘ |
| cosmologicalEpoch | pre-electroweak epoch ⓘ |
| dependsOn |
CP-violating phases in lepton sector
ⓘ
Yukawa couplings of heavy neutrinos ⓘ |
| energyScale | typically high-energy scale ⓘ |
| field |
astroparticle physics
ⓘ
cosmology ⓘ particle physics ⓘ |
| hasVariant |
non-thermal leptogenesis
ⓘ
resonant leptogenesis ⓘ soft leptogenesis ⓘ thermal leptogenesis ⓘ |
| historicalContext | developed after discovery of neutrino mass indications ⓘ |
| mathematicalFramework | Boltzmann equations for number densities ⓘ |
| oftenRealizedIn |
grand unified theories
ⓘ
supersymmetric models ⓘ type-I seesaw models ⓘ |
| predicts | link between baryon asymmetry and neutrino sector ⓘ |
| relatedTo |
baryogenesis
ⓘ
electroweak sphalerons ⓘ neutrino masses ⓘ neutrino oscillations ⓘ |
| requires |
CP-violating decays
ⓘ
departure from thermal equilibrium ⓘ lepton number violation ⓘ |
| resultsIn | baryon asymmetry ⓘ |
| satisfiesCondition | Sakharov conditions ⓘ |
| status | hypothetical mechanism ⓘ |
| symmetryInvolved |
Leptogenesis
self-linksurface differs
ⓘ
surface form:
B−L (baryon minus lepton) symmetry
|
| testability |
indirect via CP violation in lepton sector
ⓘ
indirect via neutrino properties ⓘ |
| timePeriod | early universe ⓘ |
| typicallyInvolves |
heavy Majorana neutrinos
ⓘ
right-handed neutrinos ⓘ seesaw mechanism ⓘ |
| usesProcess |
CP violation
ⓘ
lepton number violation ⓘ out-of-equilibrium dynamics ⓘ |
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: Leptogenesis Description of subject: Leptogenesis is a theoretical cosmological mechanism that explains the observed matter–antimatter asymmetry of the universe through an initial imbalance in leptons, later converted into a baryon asymmetry.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
B−L (baryon minus lepton) symmetry