Fixed light inputs: distinguish the heavy ring
Follow parameter paths that preserve selected light masses and mixing while changing heavy states or current factors.
Control names are kept as they appear in the application. Start with a reference, change one input at a time, and retain the assumptions with your result.
What this tool is for
Use this to ask whether the chosen light data determine the heavy sector uniquely. The experiment gives explicit counterexamples along supported parameter paths and points to additional observables that can distinguish them.
First steps
- Set the desired light inputs in the flavour card.
- Choose a parameter to investigate and a position along the path.
- Read the light reconstruction residual with the heavy response.
- Compare raw and normalized vacuum current factors separately.
Controls and inputs
| Control | Meaning | Try this |
|---|---|---|
| Parameter to investigate / position | Selects a supported path and a point between its endpoints. | Start with the fixed-light heavy-splitting preset. |
| Sterile copy and heavy pair | Choose the heavy response displayed for that point. | Compare different pairs while retaining the same light inputs. |
| Source, detected flavour and propagation | Select a vacuum channel and neutrino or antineutrino propagation. | Compare raw and normalized quantities for the same channel. |
Reading the results
| Result | Meaning |
|---|---|
| Light reconstruction residual | Checks how closely the chosen masses and orientation remain fixed along valid points. |
| Heavy centres and splittings | Can vary despite fixed selected light inputs. |
| Current factors and DeepCore reference | The former explore the extension; the latter retains the archived standard-model hypothesis and grid limits. |
Normalization can hide a common suppression. The archived DeepCore map is a standard-three-neutrino reference, not a likelihood for this nonunitary ring extension.
Worked example
See a suppression disappear under normalization
- Choose Common suppression hidden by normalization.
- Compare the raw factor with the normalized shape.
- Switch to unequal deficits and compare the shape again.
What to expect: A normalized shape alone can miss information carried by an overall current normalization.
Scope and limitations
- The supported paths do not exhaust all degeneracies.
- Vacuum calculations omit matter propagation and a detector event model.
- No nonunitary-ring exclusion is inferred from the DeepCore grid.
If something is unclear
The DeepCore value is unavailable.
Check the archived grid bounds; the laboratory does not extrapolate a new likelihood.
Sources and attribution
Current instrument guide. Archived editions retain their own scope.
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