Published May 31, 2026 | Version V2
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Dispersion of GN Measurements: Strong Metric Projection and (m,l,t) Convention in the Conceptual Triptych

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This note applies the strong metric projection convention of the Conceptual Triptych (TC) to a corpus of 18 experimental measurements of G_N published between 1996 and 2026, supplemented by CODATA 2018 as normalisation reference. Each measurement is decomposed into elementary quantities — masses (m), lengths (ℓ), times (t) — classified as effective (E) or algebraic (A) according to the experimental protocol read from the primary papers. The TC prediction is δ = −n_eff × T1, with T1 = 118.09 ppm derived algebraically from α_s = 3/(8π) and f_F ∈ Z[√2], without free parameter. Five experimental families are identified (standard ToS, AAF/Cavendish, quartz resonance, Fabry-Perot double pendulum, atom interferometry) with n_eff = 0, +1, +2, +2, +3 respectively. The Schlamminger/NIST 2026 blind measurement (Metrologia 63, 025012) strongly suggests an experimental bias in the original BIPM measurements. Two TC values of G_N are discussed: G_N^eff (effective anchor, n = 0) and G_N^alg = G_N^eff × P (algebraic, n = +2), derived from the geometric projection Z[√2] → Z[√π]. Version 2 supersedes the note “Prediction of G_N and M_Pl from the Extended Triptych” (v1, May 2026, DOI: 10.5281/zenodo.20011470).

 

Description FR :

Cette note applique la convention de projection métrique forte du Triptyque Conceptuel (TC) à un corpus de 18 mesures expérimentales de G_N publiées entre 1996 et 2026, auxquelles s’ajoute CODATA 2018 comme référence de normalisation. Chaque mesure est décomposée en termes élémentaires — masses (m), longueurs (ℓ), temps (t) — classés selon leur géométrie de mesure, effective (E) ou algébrique (A), à partir des protocoles expérimentaux lus sur les papiers primaires. La prédiction TC est δ = −n_eff × T1, avec T1 = 118,09 ppm dérivé algébriquement depuis α_s = 3/(8π) et f_F ∈ Z[√2], sans paramètre libre. Cinq familles expérimentales sont identifiées (ToS standard, AAF/Cavendish, résonance quartz, double pendule Fabry-Pérot, interférométrie atomique) avec n_eff = 0, +1, +2, +2, +3 respectivement. La mesure aveugle Schlamminger/NIST 2026 (Metrologia 63, 025012) suggère fortement un biais expérimental dans les mesures BIPM originales. Deux valeurs TC de G_N sont discutées : G_N^eff (ancrage effectif, n = 0) et G_N^alg = G_N^eff × P (algébrique, n = +2), issue de la projection géométrique Z[√2] → Z[√π]. Version 2 remplace la note « Prediction of G_N and M_Pl from the Extended Triptych » (v1, mai 2026, DOI : 10.5281/zenodo.20011470).

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Translated title (French)
Dispersion des mesures de GN : projection métrique forte et convention (m,l,t) dans le Triptyque Conceptuel

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