Magnetic monopole null

Magnetic-monopole null — DCT predicts no GUT-phase monopoles.

Prediction	No magnetic monopoles (no GUT phase transition)
Measured	MACRO + IceCube + ATLAS limits
Residual	0.0σ
Status	DCT wins
Source paper	DCT-SM-01

Mechanism

DCT does not contain a GUT phase transition that produces topologically stable monopoles. The McKay 2I → E₈ structure (DCT-SM-01) selects the SM at all energies, so magnetic monopoles are not produced in the early universe.

Derivation

Without a GUT-scale phase transition, no \(\pi_2\)-stable solitons appear in the early Universe. All monopole searches return null, consistent with DCT.

Python verification

The verification script for this observable is particle_physics_tests.py. Run it with python3 particle_physics_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed above.

Methodology

Domain	Standard Model number suite (SM)
Input data source	See "References" below for the canonical public-archive citation. The verification script consumes the published value (or the public dataset, where applicable) and compares against the DCT closed-form prediction.
Measurement procedure	The measured value used here is the most recent peer-reviewed central value plus 1σ uncertainty from the cited reference; no internal recalibration is applied.
Acceptance threshold	HIT: residual within 1σ of measurement. SOFT: directional agreement, residual 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 the verdict pill in the prediction table above.

Cross-references

Related observables in the same domain: proton-decay-null.

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

Audit notes

Status post-: this observable's verdict above reflects the corpus-canonical (constant-\(P_0\)) treatment. Any prior interim Avrami-extension framing has been reverted (see /updates/ for the change log). The cluster-paper deep-link above (DCT-SM-01) is the canonical source of the derivation chain.

References

Particle Data Group 2024
Source paper: DCT-SM-01

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