fundamental interaction
Enable an agent to recognise a proposed fundamental interaction, assess its theoretical and empirical standing, and choose an appropriate description for a physical situation.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a proposed fundamental interaction, assess its theoretical and empirical standing, and choose an appropriate description for a physical situation.
A fundamental interaction is one of the four currently established classes of physical interaction - gravitational, electromagnetic, strong and weak - through which physical systems influence one another and which are not generally treated as residual effects of other interactions.
It can be Classify a described phenomenon by candidate underlying interactions while retaining multiple contributions where necessary.; Select a theoretical description appropriate to the relevant energy, distance and precision.; Identify participating entities and determine whether a proposed process is permitted within a stated theory.; Compare interaction strengths only after aligning quantities, scales and conventions.; Translate a proposed additional interaction into observable signatures and bounded tests.; Explain when available evidence warrants a prediction, an approximation or an unresolved classification..
Distinguishing features
A candidate must specify a physical coupling or dynamical influence; a correlation alone does not identify an interaction.
Fundamentality must be asserted relative to a named framework, rather than inferred from an effect being strong, ubiquitous or difficult to explain.
A force such as friction does not qualify as a separate fundamental interaction when its relevant description derives it from underlying interactions.
An interaction is distinguished from its mediator or field: a photon is not itself electromagnetism.
A shared theoretical description does not automatically erase experimentally useful distinctions, as illustrated by electromagnetic and weak phenomena within electroweak theory.
Scope
+ The conventional gravitational, electromagnetic, strong and weak interaction categories and their framework-dependent relationships
+ Criteria for distinguishing fundamental interactions from effective forces and emergent behaviour
+ Participating entities, coupling properties and interaction-specific selection rules
+ Theoretical descriptions, domains of applicability and experimentally accessible signatures
+ Proposed additional interactions, explicitly distinguished from established interactions
- Complete models of particles, fields or spacetime as entities in their own right
- Contact forces, friction and other effective interactions as independently fundamental categories
- Detailed experimental apparatus and laboratory operating procedures
- Complete histories or encyclopaedic treatments of physical theories
- Social interaction, software interaction and other nonphysical senses of interaction
Characteristics
- Interaction identity
- gravitational | electromagnetic | strong | weak | proposed additional interaction Separates conventional categories from hypotheses without treating every observed force as a new interaction.
- Fundamentality status
- treated as fundamental within named framework | effective or emergent within named framework | disputed | unresolved Prevents a framework-dependent classification from becoming an unconditional claim about nature.
- Theoretical description
- Named theory, formulation, approximation and applicable regime Determines which representations and predictions an agent may use.
- Coupled properties
- Relevant charges, currents, energy-momentum or other theory-specified coupling quantities Identifies what participates and prevents particle names alone from substituting for coupling rules.
- Coupling strength
- Theory-defined parameter with units or dimensionless convention, energy scale and uncertainty Makes strength comparisons meaningful only under stated definitions and conditions.
- Characteristic range
- Metres where a range is well defined; otherwise a qualified description with screening, confinement and regime conditions Avoids treating observable reach, mediator mass and fundamental field behaviour as interchangeable.
- Empirical standing
- established phenomenon | supported candidate | constrained hypothesis | excluded within specified parameter region | unresolved Separates evidence for an interaction from evidence for a particular mechanism or formulation.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 16 findings · 26 questions.
Identity and fundamentality Establishes what interaction is being represented and the framework within which it counts as fundamental.
The word fundamental can indicate a working theoretical classification or a stronger claim about irreducibility, and those claims must remain distinguishable.
Physical sense
Fixes the meaning of interaction and separates its identity from a particular manifestation.
Interaction identity test
Record whether the subject is an interaction category, an observed effect, a field or a mediator before assigning it to this model.
- What physical coupling or dynamical influence does this name denote? definition
- Is the described subject the interaction itself, or a particle, field or effective force associated with it? boundary
Framework-relative status
Records the grounds and limits of a fundamentality claim.
Irreducibility claim
Attach fundamentality to a named framework and distinguish conventional classification from an argument that no deeper account is possible.
- Within which framework is this interaction treated as irreducible? definition
- Which source or research position supports that classification, and what competing account challenges it? provenance
Coupling and participation Describes what couples, how strongly it couples and which processes the coupling permits.
An agent cannot infer participation merely from proximity or from a loose description of attraction and repulsion.
Coupling properties
Identifies the quantities through which entities participate in the interaction.
Participation conditions
Record the theory-specific charges, currents or other quantities that enter the coupling, including conditions for absent or suppressed participation.
- Which properties of an entity determine its coupling to this interaction in the selected theory? definition
- Does apparent nonparticipation mean no coupling, a suppressed process or an effect below measurement sensitivity? boundary
Strength and process rules
Connects coupling parameters to allowed processes without reducing every interaction to a force law.
Parameterised process assessment
Record coupling conventions, scale dependence and applicable conservation or selection rules before assessing a proposed process.
- What coupling parameter is used, at what energy scale and with which units or normalisation? measurement
- Which conservation laws or selection rules permit, suppress or forbid the proposed process within this description? action
Theory and regime Organises alternative mathematical descriptions and the conditions under which each can support reasoning.
Classical forces, quantum field descriptions and geometric gravity do not supply interchangeable explanatory objects.
Representation
Records how a theory represents the interaction and which representational elements have independent empirical support.
Field, mediator and geometry
Keep force, field, quantum mediator and spacetime geometry descriptions tied to their frameworks; distinguish an established interaction from a hypothetical mediator.
- Does the selected description represent this interaction through a force, a field, quantum exchange, spacetime geometry or a combination? definition
- Which proposed mediators or mechanisms have direct evidence, and which remain theoretical? provenance
Validity and unification
Records approximation limits and relationships between interaction categories across regimes.
Regime-dependent description
Specify the conditions for using a description and distinguish established theoretical relationships from proposed further unification.
- At the relevant energy, distance and precision, which description is justified and which neglected effects matter? action
- How does the framework relate this interaction to others, and is that relationship established or hypothetical? boundary
Manifestations and attribution Connects interaction categories to observable effects while accounting for composite systems and competing contributions.
Observable forces and outcomes can combine several interactions or express effective behaviour rather than reveal a single fundamental coupling directly.
Observable signatures
Identifies quantities through which an interaction can be inferred in a particular setting.
Signature selection
Choose relevant observables such as scattering distributions, transition or decay rates, deflections or energy shifts, with a theory linking them to the interaction.
- Which observable would change if the proposed interaction contribution were absent or altered? measurement
- What alternative interaction or background process could produce a similar signature? boundary
Effective behaviour
Separates underlying interactions from their large-scale, residual or environment-dependent manifestations.
Range and emergence
Record whether observed behaviour reflects the underlying coupling, screening, confinement, residual interactions or collective effects.
- What determines the observed distance dependence, and under what conditions is a characteristic range meaningful? measurement
- Is this effect a distinct fundamental interaction or an effective manifestation of an already represented interaction? boundary
Evidence and permitted inference Tracks support for interaction claims and limits the conclusions an agent draws from measurements.
Evidence for a physical effect, a coupling parameter and a complete theoretical account can have different strengths.
Claim-specific evidence
Associates each substantive claim with the measurement or argument that supports it.
Evidence target
Distinguish evidence that an interaction occurs from evidence for its mediator, coupling law or proposed unification.
- Which exact claim does the cited observation test: existence, coupling strength, mediator properties or theoretical structure? provenance
- What uncertainties and model assumptions limit that inference? measurement
Additional interaction tests
Makes proposals for new interactions testable without presenting them as established categories.
Bounded hypothesis decision
Record a candidate interaction's predicted departures and the parameter regions tested; interpret null results within those limits.
- What observable departure from the baseline theory would discriminate this candidate interaction? measurement
- Given the tested parameter region and sensitivity, should an agent retain, constrain or reject this specific hypothesis? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The intended sense is fundamental interaction in physics; the supplied domain code alone does not establish that sense.
- The conventional count of four coexists with electroweak unification; gravity is described by general relativity and is outside the Standard Model of particle physics.
- This is recall rather than source-checked research; no identifiers or regulatory standards are asserted.
- Which of these check these first hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Gravitational interaction
- Electromagnetic interaction
- Strong interaction
- Weak interaction
- Which of these kinds and varieties hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Electromagnetic interaction underlies electrical circuits, optics and chemical bonding.
- Strong interaction binds quarks into hadrons and, through its residual effects, binds atomic nuclei.
- Weak interaction governs beta decay and contributes to stellar nuclear reactions.
- Gravitational interaction is used to predict orbits and model stars, galaxies and cosmological evolution.
- Which of these real-world use hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Electromagnetic coupling expressed by the fine-structure constant - Approximately 1/137 in the low-energy limit; its effective value depends on energy scale. - dimensionless
- Characteristic range of the weak interaction - On the order of 10^-18 m, associated with the masses of the W and Z bosons. - m
- Which of these typical measurements hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Quoting relative interaction strengths without specifying energy scale and participating particles can mislead.
- Confusing the strong interaction between quarks with the residual nuclear interaction obscures their different effective ranges.
- Treating gravity as an experimentally established quantum interaction overstates current knowledge.
- Equating every interaction with a classical force misses processes such as particle creation, annihilation and decay.
- Which of these failure modes and hazards hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Force - A force describes momentum change in a mechanical account; an interaction also encompasses processes that are not adequately described by a classical force.
- Electroweak interaction - Electroweak theory provides a unified description of electromagnetic and weak interactions rather than adding a fifth established interaction.
- Residual nuclear interaction - The interaction between nucleons is an effective consequence of the strong interaction, rather than a separate fundamental interaction.
- Fundamental particle - A fundamental particle is an elementary constituent or excitation; a fundamental interaction describes how physical systems couple.
- Fifth force - A fifth force is a proposed additional fundamental interaction, whereas the four listed interactions are established.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of fundamental interaction this model covers, and on what evidence? provenance
What the second pass must settle
- Which reference sources and research positions should anchor the definition of fundamentality, especially where effective or emergent accounts challenge it?
- Does an existing Vercy world model already own this physical concept, requiring this registry entry to link to it?
- How should the registry's ACT / ACT.ACT placement connect to physical-domain models without silently changing its authoritative classification?
- How should electroweak relationships and proposed further unification be represented while retaining useful identities for electromagnetic and weak phenomena?
- Which benchmark measurements and comparison conventions should the researched model use for coupling strength, range and evidence status?