Pith Number

pith:XKP6U2Y3

pith:2011:XKP6U2Y3233II3AEQDXBHY745O

not attested not anchored not stored refs pending

Precise measurement of positronium hyperfine splitting using the Zeeman effect

A. Ishida, A. Yamamoto, G. Akimoto, H. Saito, K. Tanaka, M. Yoshida, S. Asai, T. Kobayashi, T. Namba, T. Suehara, Y. Sasaki

arxiv:1105.4392 v2 · 2011-05-23 · physics.atom-ph · 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{XKP6U2Y3233II3AEQDXBHY745O}

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	2026-05-18T02:01:52.875718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba9fea6b1bd6f6846c0480ee13e3fcebad3de2f7fc9dd5df8cf63f0f176e20f8

Aliases

arxiv: 1105.4392 · arxiv_version: 1105.4392v2 · doi: 10.48550/arxiv.1105.4392 · pith_short_12: XKP6U2Y3233I · pith_short_16: XKP6U2Y3233II3AE · pith_short_8: XKP6U2Y3

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/XKP6U2Y3233II3AEQDXBHY745O \
  | 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: ba9fea6b1bd6f6846c0480ee13e3fcebad3de2f7fc9dd5df8cf63f0f176e20f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b46358c41191ae0d52d5e17ceee0709a2d9b81b5f13484880bd45bbbbebd702",
    "cross_cats_sorted": [
      "hep-ex"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2011-05-23T02:55:42Z",
    "title_canon_sha256": "146398b0f897869bc39c2238c824f539f64685a38d9492b1f5053992a773a159"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4392",
    "kind": "arxiv",
    "version": 2
  }
}