Pith Number

pith:PNRD5WUJ

pith:2014:PNRD5WUJQ2ILVLWVIZLDER6UWU

not attested not anchored not stored refs pending

Positronium hyperfine splitting at order $m \alpha^7$: light-by-light scattering in the two-photon-exchange channel

Gregory S. Adkins, Richard N. Fell

arxiv:1402.7040 v1 · 2014-02-27 · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PNRD5WUJQ2ILVLWVIZLDER6UWU}

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	2026-05-18T02:51:00.856557Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b623eda898690baaed546563247d4b53a369a88e42f56688036b9903b8bc1ee

Aliases

arxiv: 1402.7040 · arxiv_version: 1402.7040v1 · doi: 10.48550/arxiv.1402.7040 · pith_short_12: PNRD5WUJQ2IL · pith_short_16: PNRD5WUJQ2ILVLWV · pith_short_8: PNRD5WUJ

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/PNRD5WUJQ2ILVLWVIZLDER6UWU \
  | 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: 7b623eda898690baaed546563247d4b53a369a88e42f56688036b9903b8bc1ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80bbaa5875fefdb43cdec5023b2174cbd1287e5e4d2a05e492dee9efd759b7a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2014-02-27T19:46:12Z",
    "title_canon_sha256": "9fdd058a699edc98640ebe46f0ec071edae3d9c74d6860975c8dd36997a9b50d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.7040",
    "kind": "arxiv",
    "version": 1
  }
}