Pith Number

pith:SWQPPMOS

pith:2018:SWQPPMOSM7X47QNRJBNY3UTEMN

not attested not anchored not stored refs pending

The positronium hyperfine structure: Progress towards a direct measurement of the $\text{2}^\text{3}\text{S}_\text{1} \rightarrow \text{2}^\text{1}\text{S}_\text{0}$ transition in vacuum

A. Rubbia, G. Wichmann, M. Heiss, P. Crivelli

arxiv:1805.05886 v3 · 2018-05-15 · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SWQPPMOSM7X47QNRJBNY3UTEMN}

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

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	2026-05-18T00:13:10.054069Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95a0f7b1d267efcfc1b1485b8dd264635e4fb1b9e64b3b3e47d477cf86251ce6

Aliases

arxiv: 1805.05886 · arxiv_version: 1805.05886v3 · doi: 10.48550/arxiv.1805.05886 · pith_short_12: SWQPPMOSM7X4 · pith_short_16: SWQPPMOSM7X47QNR · pith_short_8: SWQPPMOS

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/SWQPPMOSM7X47QNRJBNY3UTEMN \
  | 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: 95a0f7b1d267efcfc1b1485b8dd264635e4fb1b9e64b3b3e47d477cf86251ce6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f3437cfc81b2854a29a719afe2d23a8ca154cafcf72629238cc3243d4be253f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2018-05-15T16:19:15Z",
    "title_canon_sha256": "189d46b53eb8873189351f8621788e8df880f457e1fa9f2d5f5a62a453452435"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.05886",
    "kind": "arxiv",
    "version": 3
  }
}