Pith Number

pith:4YABQSOM

pith:2009:4YABQSOMDTYFRL5DZNB4MYPBDU

not attested not anchored not stored refs pending

Solving for tadpole coefficients in one-loop amplitudes

Bo Feng, Ruth Britto

arxiv:0904.2766 v2 · 2009-04-17 · hep-th · 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{4YABQSOMDTYFRL5DZNB4MYPBDU}

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	2026-05-18T04:31:31.364226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6001849cc1cf058afa3cb43c661e11d1738a5b95df9a4fc5a72c28ae486aff2

Aliases

arxiv: 0904.2766 · arxiv_version: 0904.2766v2 · doi: 10.48550/arxiv.0904.2766 · pith_short_12: 4YABQSOMDTYF · pith_short_16: 4YABQSOMDTYFRL5D · pith_short_8: 4YABQSOM

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/4YABQSOMDTYFRL5DZNB4MYPBDU \
  | 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: e6001849cc1cf058afa3cb43c661e11d1738a5b95df9a4fc5a72c28ae486aff2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74c3a269593c8e71d395a05856e510356d7a71fba46e0adafa52890642c16a2d",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2009-04-17T19:14:00Z",
    "title_canon_sha256": "8e184959e4b5ec9ce6d232210dc9832db68b9e420235eec19d2965b0982e4e7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2766",
    "kind": "arxiv",
    "version": 2
  }
}