Eta-eta prime splitting
The eta-eta' mass splitting (~410 MeV) exceeds what quark masses alone can explain; the resolution is the axial anomaly breaking U(1)_A symmetry via quantum effects (instantons in orthodox QCD, defect-functional topology in Category tau), giving the eta' its anomalously large mas
What this page is
This is a public Results-lane surface for a noteworthy Physics Registry item. It is generated from the Corpus Registry triage catalogue and keeps the generic Result catalogue unchanged.
Registry evidence
- Registry item: IV.R128
- Type: remark
- Scope: conjectural
- Lean status: formalized
- Book / part / chapter: Book IV · Part 6 · Chapter 48
Result summary
The eta-eta’ mass splitting (~410 MeV) exceeds what quark masses alone can explain; the resolution is the axial anomaly breaking U(1)_A symmetry via quantum effects (instantons in orthodox QCD, defect-functional topology in Category tau), giving the eta’ its anomalously large mass.
Related Results surfaces
- Glueballs: Mass Gap = Minimum Glueball Mass
- QCD Phases: Quark-Gluon Plasma as High-Temperature Confinement
- Quark–gluon plasma
- Specific models of quark–gluon plasma formation
- QCD Phases: Quark-Gluon Plasma as High-Temperature Confinement
Reading role
Use as Registry evidence for an existing Results surface.
Claim boundary
This page reports a Registry-backed internal result surface. It is not an external validation claim, a scientific consensus claim, or independent acceptance.
Curation rationale
- physics-facing terms: mass, qcd
- result-facing terms: resolution
- candidate is better handled as evidence for an inferred existing public surface
Review notes
- No additional review notes recorded.