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P13 Success GN 1,60 vs 1,57 · Regge 0,884 vs 0,9 Physique nucléaire

Stabilité comme forme du potentiel

La stabilité est lue comme forme du potentiel : pente de Geiger-Nuttall dérivée 1,60 (mesurée 1,57) ; pente de Regge 0,884 (mesurée 0,9 GeV⁻²).

◫ Simulation figure(s)

Figure P13

JSON results — converted to tables

Machine-readable artefacts frozen by SHA-256. Each JSON structure is unfolded into tables; the "raw JSON" link points to the source file on GitHub.

p13_stabilite.json 9 table(s) · 46 rows Raw JSON on GitHub
ChampValeur
hc_MeVfm197.327
e2_MeVfm1.43996
r0_fm1.2
m_alpha_MeV3727.38

Explanation — context & formalism

P13 — Stability as Form of the Potential

Domain: Nuclear and particle physics — alpha decay, quark confinement Status: ✅ Success Data: 15 alpha-emitters (Geiger-Nuttall), string tension σ = 0.18 GeV², Regge slope 0.9 GeV⁻² Solver: WKB barrier penetration (finite) + linear potential (infinite)

Problem

Stability has two faces:

  1. Finite barrier: alpha radioactivity — the alpha tunnels through a

Coulomb barrier. The Geiger-Nuttall law spans 30 orders of magnitude.

  1. Infinite barrier: quark confinement — the potential V = σr rises

linearly, preventing free quarks. String breaking occurs at 2m_ρ.

Can a single framework (finite-core potential) capture both?

Anchors (measured)

Protocol

Slope 1 — Alpha decay (finite barrier):

  1. Gamow WKB integral for Coulomb barrier with r0 = 1.2 fm.
  2. Compute log₁₀ T₁/₂ in logarithmic space (avoids exp(2G) overflow).
  3. Fit slope and compare to measured Geiger-Nuttall line.

Slope 2 — Confinement (infinite barrier):

  1. String breaking: σr = 2m_ρr_break.
  2. Regge trajectory: M² = 2πσ(n+J) → slope 1/(2πσ).
  3. Linear well spectrum: M_n² = 2πσn.

Results

ObservableCalculatedMeasuredMatch
GN slope1.601.57✓ Within 2 %
Hierarchy32.7 orders32.7 orders✓ Exact
String break1.70 fm1.5–2.0 fm✓ Within range
Regge slope0.884 GeV⁻²0.9 GeV⁻²✓ Within 2 %

What the solver shows

The finite-core model unifies two stability regimes:

  1. Alpha decay: the WKB integral through the Coulomb barrier reproduces the

Geiger-Nuttall slope and the 30-order hierarchy without fitting. The absolute offset (preformation factor) is logged but not predicted — the test is on the slope and the hierarchy, which are robust.

  1. Confinement: the linear potential V = σr breaks at 2m_ρ (no free

quarks), and the Regge slope 1/(2πσ) matches the measured hadron spectrum. The finite core becomes an infinite barrier in the quark sector — the same geometric framework, different scale.

Limitations (published)

(preformation dominates the offset).

summarised in J.

Verdict

P13 is a success: the finite-core potential reproduces both alpha-decay kinematics (Geiger-Nuttall slope and hierarchy) and quark-confinement phenomenology (string breaking, Regge slope) with no free parameters. The same geometric framework — finite barrier for nuclei, infinite barrier for quarks — covers 30 orders of magnitude in stability.

New explanation: stability is the form of the potential. Finite barriers produce tunnelling (radioactivity); infinite barriers produce confinement. Both are consequences of the finite-core geometry, extended across nuclear and hadronic scales.


Stratum: S3 (off-corpus, constitutive) Anchors: Alpha-decay data (S2), lattice-QCD string tension (S2) No adjusted parameters.

Document source

Reports (PDF verdict notes)

</> Simulation — Python scripts

p13_stabilite.py

⌗ Cross-references

§ Related glossary entries

Geiger–Nuttall — Loi empirique liant demi-vie α et énergie : pente dérivée 1,60 contre 1,57 mesurée.
Trajectoire de Regge — Relation J ∝ M² des hadrons sur des trajectoires de pente quasi universelle (~0,9 GeV⁻² ; dérivée 0,884).
Potentiel de Cornell — Potentiel V(r) = −a/r + σr du charmonium ; ses espacements sont reproduits à mieux que 1 %.

See the full glossary →