Pith Number

pith:XH5E3Z4H

pith:2005:XH5E3Z4HX3IXMFNL6SJA5YZ7IQ

not attested not anchored not stored refs pending

First measurement of the $\pi^+\pi^-$ atom lifetime

The DIRAC collaboration

arxiv:hep-ex/0504044 v2 · 2005-04-26 · hep-ex

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XH5E3Z4HX3IXMFNL6SJA5YZ7IQ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:47:30.559075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9fa4de787bed17615abf4920ee33f44337a2d6bccf7e1174c861ed7f3f94b15

Aliases

arxiv: hep-ex/0504044 · arxiv_version: hep-ex/0504044v2 · doi: 10.48550/arxiv.hep-ex/0504044 · pith_short_12: XH5E3Z4HX3IX · pith_short_16: XH5E3Z4HX3IXMFNL · pith_short_8: XH5E3Z4H

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/XH5E3Z4HX3IXMFNL6SJA5YZ7IQ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b9fa4de787bed17615abf4920ee33f44337a2d6bccf7e1174c861ed7f3f94b15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e21e09c38f67174b4338c6f22cef9cc204bba771af0f3083e16cf8d0c74e2584",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-ex",
    "submitted_at": "2005-04-26T07:46:52Z",
    "title_canon_sha256": "1a78f032b338ba57ef940bbf3f1e6428cdb28a39849e80132d90bfecc3e3b773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-ex/0504044",
    "kind": "arxiv",
    "version": 2
  }
}