{
 "id": "LIB2-127",
 "entry_version": 7,
 "class": "CLAIM",
 "title": "The electron value is the light Koide root under an external empirical rule",
 "statement": "With the measured tau anchor and QED-matched muon mass, the external empirical Koide rule K = 2/3 gives the selected light root me = 0.5076 MeV.",
 "scope": {
  "carrier": "The charged-lepton Koide closure with its selected light branch",
  "domain": "The Koide-consistent electron chain, not an algebra-only mass derivation.",
  "group": null,
  "hypotheses": [
   "Use the external empirical relation K = 2/3.",
   "Supply the measured tau mass and the preceding QED-matched muon chain.",
   "Select the light positive root as in the source."
  ],
  "physical_target": "Koide-consistent electron mass",
  "quantifier": "The registered construction and its stated hypotheses.",
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": "NOT_PRINTED",
  "attachment": "NOT_PRINTED",
  "scorecard_tier_word": null,
  "pdf_page": 34
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "UNDER_REVIEW (house status not yet adjudicated)",
 "evidence_status": [
  {
   "kind": "registry",
   "availability": "shipped"
  }
 ],
 "primary_source": {
  "component": "Paper 2",
  "section": "§3.2, External Koide premise",
  "pdf_page": 36,
  "quote": "The electron mass is determined by the external empirical relation K = 2/3 acting on that mµ chain and the measured mτ anchor [A636, A637]."
 },
 "caution": "This empirical-rule closure does not derive the electron mass from the bare Jordan algebra or remove the muon-chain loading.",
 "candidate_ids": [
  "C2-020",
  "C2-057"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [
  {
   "type": "depends_on",
   "target": "LIB2-126"
  },
  {
   "type": "uses_input",
   "target": "LIB2-124"
  },
  {
   "type": "rests_on_premise",
   "target": "PRM-019"
  },
  {
   "type": "rests_on_premise",
   "target": "PRM-030"
  }
 ],
 "url": "/library-v2/LIB2-127/",
 "content_sha256": "43276a80bd768e5ab0aab62b0890aca960cb7b0d8313f81ea25fd509b9a41d96",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}