Observable detail · FORWARD

Hyper-K reactor \(\theta_{13}\) (forward)

Prediction / mechanism	Forward; Hyper-K reactor channel sharpens \(\theta_{13}\) measurement.
Measured	Hyper-K reactor channel \(\sim 2030\).
Residual / status	OPEN / FORWARD
Status	OPEN
Source paper	DCT-SM-01

Mechanism

PMNS third-row mixing.

Derivation

The derivation chain follows the cluster paper DCT-SM-01 and reduces to the canonical DCT constants (\(P_0 = 0.851\), \(\omega_0 = 50{,}037\), \(c_{BD} = 138{,}189\), master identity \(2\omega_0 + 3 = c_{BD} \cdot P_0^2 = 100{,}077\)). See the cluster paper for the full multi-line derivation.

Methodology

Domain	Forward experiment (FORWARD)
Input data source	See "References" below for the canonical public-archive citation.
Measurement procedure	The measured value used here is the most recent peer-reviewed central value plus 1σ uncertainty from the cited reference.
Acceptance threshold	HIT: residual within 1σ of measurement. SOFT: directional agreement within bracketing range. OPEN: untested or unresolved.
Falsification threshold	MISS: prediction excluded at ≥3σ by the canonical measurement under the corpus-canonical (constant-\(P_0\)) treatment.
Current status	See verdict pill above.

Python verification

Verification script: particle_physics_tests.py. Run with python3 particle_physics_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed below.

Cross-references

Related observables: pmns-theta13 · sin-theta-13 · ckm-s13.

Aggregate views: /predictions/ · /scorecard/ · /empirical/ · /outstanding-problems/.

Audit notes

This sub-page is part of the post-build-out of the observable archive (see the observable index). Verdict reflects the corpus-canonical (constant-\(P_0\)) treatment. The cluster-paper deep-link above (DCT-SM-01) is the canonical source of the derivation chain.

References

Hyper-K Collaboration
Source paper: DCT-SM-01

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