Pith Number

pith:7VPPI25E

pith:2009:7VPPI25EXABE7LMKHVP7SNPG77

not attested not anchored not stored refs pending

Angular Momentum in Non-Relativistic QED and Photon Contribution to Spin of Hydrogen Atom

Panying Chen, Xiangdong Ji, Yang Xu, Yue Zhang

arxiv:0909.1560 v1 · 2009-09-08 · 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{7VPPI25EXABE7LMKHVP7SNPG77}

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	2026-05-18T02:34:30.728010Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd5ef46ba4b8024fad8a3d5ff935e6ffc0201e6f210a0b06b726ad008bfb14a6

Aliases

arxiv: 0909.1560 · arxiv_version: 0909.1560v1 · doi: 10.48550/arxiv.0909.1560 · pith_short_12: 7VPPI25EXABE · pith_short_16: 7VPPI25EXABE7LMK · pith_short_8: 7VPPI25E

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/7VPPI25EXABE7LMKHVP7SNPG77 \
  | 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: fd5ef46ba4b8024fad8a3d5ff935e6ffc0201e6f210a0b06b726ad008bfb14a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff3b73da8814de8b2a76d46a0954cf6d955fe7131fc2adb82fc9e08c6d55d485",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2009-09-08T20:05:09Z",
    "title_canon_sha256": "10be5223fcdfa6bdf58123186a324607508b1a277b0c0ce95d3218722efa9da0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1560",
    "kind": "arxiv",
    "version": 1
  }
}