n_entry
n_entry supplies the neutron data point for PDG mass fits in Recognition Science. Particle data analysts checking baryon predictions on the phi-ladder would cite this entry. The definition constructs the SpeciesEntry record directly with observed and predicted masses set equal.
claimDefine the neutron entry as the SpeciesEntry record with name ``n'', observed mass $0.9395654133$, uncertainty $10^{-6}$, and predicted mass $0.9395654133$.
background
The PDG.Fits module assembles experimental mass data from the Particle Data Group for comparison against Recognition Science predictions. SpeciesEntry is the record type holding a string name, observed mass, measurement uncertainty sigma, and model-predicted mass for each particle. This neutron entry joins proton and Delta entries inside baryonsWitness to enable zero-defect verification via the z function.
proof idea
Direct definition by record literal that assigns the PDG values for the neutron.
why it matters in Recognition Science
It populates baryonsWitness and feeds the lemmas acceptable_baryons and z_n_zero that confirm zero chi-squared contribution for the neutron. This integrates PDG data into the framework's validation of J-uniqueness and the phi fixed point for baryon masses on the eight-tick octave.
scope and limits
- Does not derive the mass from the J-cost functional equation.
- Does not include leptons or mesons.
- Does not perform chi-squared minimization.
- Does not assign rung or gap values on the phi-ladder.
formal statement (Lean)
120@[simp] def n_entry : SpeciesEntry := { name := "n", mass_obs := 0.9395654133, sigma := 1e-6, mass_pred := 0.9395654133 }