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# Quark
## I. What it is (established science)
Quarks are the fundamental constituents of hadrons (protons, neutrons, pions) in QCD. They are confined: no free quarks are observed; the strong coupling grows at low energy (asymptotic freedom at short distance). Established result: see QCD and confinement in the literature; RST maps this via **[[../Relational Friction]]** and **[[../Zoom Logic]]**.
## II. RST/RRT reading
| Physics | RST/RRT |
|:---|:---|
| Confinement | **Relational Friction** — the Format cannot maintain quark-scale distinction against the noise floor (\(\Lambda_{\mathrm{QCD}}\)); resolution fails. |
| No free quarks | **Zoom Logic** — coarse-graining: the substrate "sheds" resolution; hadrons are the stable resolution. |
| Scale | **typical_scale** → Planck / strong ([[Scale registry]]: quark ~ \(10^{-18}\) m). |
## III. Relations
- **composed_of:** — (fundamental in this hierarchy).
- **typical_scale:** [[Scale registry]] (quark / strong).
- **translates_from:** — (finest in the chain).
- **translates_to:** [[Hadron]]. Translation rule: [[../../expanded theory applied/further applications/Material layer/Material layer (RST)#V. Layer-to-layer translation|Material layer (RST) §V]].
```scale_part
L 1e-18
```