# 📐  L2 Spec — Charged Particle Track Reconstruction — Nominal + Mismatch Specs

**ID:** `L2-484-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-484`](/artifact/l1/L1-484)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.42 · **Delta tier:** 5
> **⛓ On-chain block:** 41555319

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| N layers | — | 4 – 20 |
| B field t | — | 0.5 – 4.0 |
| Pileup mu | — | 0 – 200 |
| Material x0 percent | — | 0.1 – 3.0 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.0005 + 0.0005 * (pileup_mu / 50) ** 0.3
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.42 |
| Delta tier | 5 |

## 4. Fingerprint

`adef92b7b855099327fe4d17b1c1a94351008a82e0e80a5bec7067b6518e9bd0`

## 5. On-chain Registration

- **Chain hash:** `0x49a0d0c665bef2a6d489691652a1e3463052d93c3247f45366d9686ef33becd5`
- **Chain tx hash:** `0xb7bb1cda6bff9d2dd2e432fb2e5104c3151d625f85f40a64aca34ea241942d72`
- **Chain block:** `41555319`

---

## File Mapping

This bundle consists of: `L2-484-001.md`, `L2-484-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-484-001.md` | Source of truth — edit this | Human or LLM |
| `L2-484-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-484-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._