Published

weak interaction

vr.tr.weak-interaction · thing-q11418

Enable an AI agent to recognise weak-interaction contributions to physical processes, assess the evidence and applicable predictions, and select justified calculations or observations.

Thing Registry Activities and processes ACT.ACT

Bundle → Layer → Finding → Questions Classifiers What it is Why it exists Distinguishing features What robots and AI may and may not do Moral aspects Owners Links to other meta-models Identity and identifiers Direct properties Recognition Capabilities and actions Hazards and failure modes Standards and interfaces Context of use Sources

Bundle → Layer → Finding → Questions Filled

6 bundles · 11 layers · 11 findings · 22 questions

Weak process identity Record the physical transition and the specific weak contribution being asserted.

Transition participants

Specify the states before and after the interaction.

Resolved transition

Record the reaction or decay, distinguishing observed products from inferred particles and constituent-level interpretations.

What initial and final states define this channel, including neutrinos, antiparticles and unresolved radiation? definition
Which participants were measured directly, inferred from missing quantities or supplied by a theoretical interpretation? provenance

Current and mediator

Identify the weak-current structure without overstating what was observed.

Weak mechanism assignment

Record charged-current, neutral-current or combined attribution and whether the mediator is virtual, resonant or represented effectively.

Which vertices or effective operators support the proposed weak-current assignment? definition
What evidence distinguishes this mechanism from an electromagnetic, strong or instrumental explanation? boundary

Channel access and suppression Record whether a proposed weak transition can occur and what controls its suppression.

Kinematic and conservation checks

Assess the proposed transition against its available energy and conserved quantities.

Channel accessibility

Record threshold calculations and conservation checks at the level appropriate to free particles, bound states or a medium.

Do the specified states conserve electric charge, energy, momentum and angular momentum? boundary
What energy release or collision energy is available after relevant masses, binding energies and environmental effects are included? measurement

Flavour and selection rules

Identify the assumptions behind an allowed, forbidden or suppressed label.

Suppression explanation

Record candidate mixing, helicity, phase-space, loop or nuclear-selection effects separately from an absolute prohibition.

Which flavour factors, spin constraints or matrix elements control this channel in the adopted theory? definition
Does 'forbidden' mean kinematically impossible, absent at a specified perturbative order or suppressed under a named selection-rule convention? boundary

Electroweak regime and calculation Record the physical scales, approximation and inputs that make a weak-process prediction usable.

Scale and propagator treatment

Specify the energy regime and mediator treatment.

Applicable description

Record the chosen effective or explicit-mediator description and the accuracy required for the intended decision.

What momentum-transfer and invariant-mass ranges must the calculation cover? measurement
At the required accuracy, is the selected effective interaction adequate, or must mediator propagation, widths and radiative corrections be retained? action

Couplings and composite inputs

Connect the prediction to traceable parameters and target-dependent inputs.

Prediction input basis

Record adopted coupling and mixing inputs, parameter conventions, and any form factors, parton distributions or nuclear matrix elements.

Which parameter determinations and composite-state calculations supply this prediction, and what versions and conventions do they use? provenance
Which input uncertainties or correlations limit the comparison with observation? measurement

Weak observables and attribution Record measurable consequences and how strongly they support a weak interpretation.

Rates and event yields

Relate theoretical transition probabilities to reported measurements.

Normalised channel strength

Record partial decay rates or cross sections with channel definitions, acceptance, exposure and uncertainties.

Which rate, width, branching fraction or cross section is measured, and over what final-state and kinematic definition? measurement
What flux, target population, luminosity, efficiency or live-time information is needed to translate that quantity into an event yield? measurement

Competing and interfering contributions

Assess whether the measurement isolates weak physics or constrains a combined process.

Attribution confidence

Record backgrounds, interference treatment and the inferential basis for claiming a weak contribution.

Which alternative mechanisms produce the same signature, and what observations constrain them? boundary
Is the reported weak component separately defined by a consistent calculation, or must the observable be interpreted using combined amplitudes? boundary
Does the evidence support a measured contribution, a candidate interpretation or only an upper limit? measurement

Symmetry tests and next actions Record symmetry-sensitive tests and the evidence needed before revising a weak-process interpretation.

Polarisation and conjugate comparisons

Define the measurements used to investigate parity or CP behaviour.

Symmetry observable definition

Record polarisation preparations, angular conventions and particle-antiparticle comparisons needed to interpret an asymmetry.

Which angular, polarisation or conjugate-channel observable tests the claimed symmetry property? definition
What acceptance, production or matter-related asymmetries must be controlled before interpreting the result? measurement

Interpretation and investigation

Connect uncertainty and discrepancies to proportionate next steps.

Justified next step

Record what can presently be concluded and which calculation, control sample or independent measurement would change that conclusion.

Which additional observable or improved calculation would best distinguish a missing conventional contribution from the proposed anomaly? action
What evidential threshold and unresolved dependencies govern whether the agent may classify the process, report a constraint or recommend further investigation? action

Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.

Reported evidence

Findings from the breadth pass, kept separate from the structural claims.

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

Which of these kinds and varieties hold for the sense of weak interaction this model covers, and on what evidence? provenance

Classifiers Filled

Family: Thing Registry
Category: Activities and processes
Entry kind: thing
Plane: ACT
Domain: ACT.ACT

What it is Filled

The weak interaction is one of the four fundamental interactions of nature: a short-range, parity-violating force mediated by massive W and Z bosons that changes fermion flavour and is responsible for beta decay and related processes.

In scope

Charged-current and neutral-current contributions to decays, scattering and particle production.
Initial and final particle states, exchanged quantum numbers and relevant flavour relationships.
Kinematic accessibility, suppression mechanisms and the validity of the chosen theoretical description.
Rates, branching fractions, cross sections and symmetry-sensitive observables.
Evidence supporting weak attribution, competing contributions and justified next investigative actions.

Out of scope

Complete particle identities and intrinsic properties, owned by particle models.
Nuclear structure and isotope inventories, except their required inputs to weak-process predictions.
Pure electromagnetic and strong processes, except as backgrounds or interfering contributions.
Neutrino mass generation and vacuum oscillation dynamics, except their interfaces with weak production and detection.
Detector construction, accelerator operation and laboratory safety procedures.
The complete electroweak symmetry-breaking mechanism and speculative extensions as independently established interactions.

Why it exists Filled

Enable an AI agent to recognise weak-interaction contributions to physical processes, assess the evidence and applicable predictions, and select justified calculations or observations.

Distinguishing features Filled

Require evidence for a W- or Z-mediated contribution, or its effective low-energy representation; a small measured force or rare event alone does not identify the weak interaction. [CERN: Standard Model](https://home.web.cern.ch/science/physics/standard-model/)
Test whether a fermion vertex exchanges electric charge through a charged current or retains it through a neutral current; weak processes need not change the observed particle species. [PDG: Electroweak Model](https://pdg.lbl.gov/2025/reviews/rpp2025-rev-standard-model.pdf)
For a claimed quark-flavour transition, test its compatibility with charged-current mixing or a specified higher-order mechanism rather than treating any particle transformation as weak. [PDG: Electroweak Model](https://pdg.lbl.gov/2025/reviews/rpp2025-rev-standard-model.pdf)
Use process-specific parity-sensitive observables to test chiral weak couplings; do not require every weak event to exhibit a measurable asymmetry. [PDG: Electroweak Model](https://pdg.lbl.gov/2025/reviews/rpp2025-rev-standard-model.pdf)
Check the energy regime before interpreting 'weak' as negligible: electromagnetic and weak effects become comparable at high energies. [CERN: Unified forces](https://home.web.cern.ch/science/physics/unified-forces/)

What robots and AI may and may not do Filled

Must not

Present speculative claims as established physics.
Confuse the weak interaction with the strong interaction.
Use the concept to promote pseudoscience about radiation.

Only with a human decision

Publishing claims of new physics.

May

Explain the weak interaction in general terms with reliable sources.
Distinguish established physics from open questions.

Moral aspects Filled

Accurate physics education builds trust in science.
Radioactive decay knowledge is tied to nuclear safety.

Who is affected

Students
The public

Owners Filled

Steward

Nobody owns it; it is a feature of nature.

Links to other meta-models Filled

parent

Q466416 - registry parent class

What else AI and robots need to interact with it Filled

Sources Filled

Review of Particle Physics: Electroweak Model and Constraints on New Physics - Standard-model definition of the weak/electroweak interaction, W/Z mediation, charged vs neutral currents, and measured couplings.
Wikidata item Q11418: weak interaction - identity and sense of the item
Wikipedia: Weak interaction - general description of the item

Open questions

Does the registry intend 'weak interaction' to cover the full weak gauge sector, including boson self-interactions, or primarily weak contributions to matter transitions?
Which existing Vercy models already own electroweak unification, particle mixing and nuclear decay, and what references will prevent duplicate ownership?
What accuracy-dependent criteria should govern switching from effective low-energy descriptions to explicit electroweak calculations across supported process families?
Which sourced selection-rule conventions and nuclear or hadronic calculations are required before this model can support quantitative decisions about composite targets?
What domain-specific evidence standards should distinguish candidate weak attribution, established contributions and credible deviations from the adopted theory?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q11418/spec.json