{"id": "card_floor_standard_model", "kind": "note", "title": "The floor of the Standard Model - where two trees meet", "body": "The Standard Model of particle physics stands on two roots: Maxwell's electromagnetism (the electromagnetic tree) and Fermi's 1933 theory of the weak interaction (the weak tree), both on quantum mechanics and special relativity. The path from this floor is a chain of builders, and the two trees CONNECT at electroweak unification (Glashow-Weinberg-Salam), hinged on the Weinberg angle cos(theta_W) = m_W/m_Z. A chain begins from a floor; the connections are where two chains become one.", "source": {"label": "Narrow Highway - the Standard-Model chain (operator seed)", "url": "", "ref": "stick_the_standard_model_chain_where_two_trees_connect", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "floor", "bands": ["floor", "standard model", "electroweak", "chain", "two trees", "physics"], "connections": [{"to_card_id": "card_k_floor_of_discovery", "relationship": "part_of", "evidence": "the Standard-Model path rests on the one Floor of Discovery"}, {"to_card_id": "card_builder_james_clerk_maxwell", "relationship": "has_part", "evidence": "electromagnetism - the EM root of the Standard-Model floor"}, {"to_card_id": "card_builder_enrico_fermi", "relationship": "has_part", "evidence": "the weak interaction - the weak root of the floor"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.floor", "facets": {"subject": ["chain", "electroweak", "physics", "standard model", "two trees"]}, "presentation": {"glyph": "•", "kind_label": "floor", "by": "Narrow Highway - the Standard-Model chain (operator seed)", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_k_floor_of_discovery", "title": "The Floor of Discovery — one floor, and by its design the fear of God", "relationship": "part of", "why": "the Standard-Model path rests on the one Floor of Discovery", "href": "/card/card_k_floor_of_discovery", "resolved": true}, {"id": "card_builder_james_clerk_maxwell", "title": "James Clerk Maxwell", "relationship": "has part", "why": "electromagnetism - the EM root of the Standard-Model floor", "href": "/card/card_builder_james_clerk_maxwell", "resolved": true}, {"id": "card_builder_enrico_fermi", "title": "Enrico Fermi", "relationship": "has part", "why": "the weak interaction - the weak root of the floor", "href": "/card/card_builder_enrico_fermi", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_floor_standard_model", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_floor_standard_model"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}