Pith Number

pith:NFTPBDAR

pith:1999:NFTPBDART6QS5QAMYPCKEH2TV6

not attested not anchored not stored refs pending

Phenomenological evidence for the energy dependence of the $\eta-\eta'$ mixing angle

J. M. Frere (Universite Libre de Bruxelles), R. Escribano

arxiv:hep-ph/9901405 v2 · 1999-01-25 · hep-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{NFTPBDART6QS5QAMYPCKEH2TV6}

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	2026-07-04T16:14:03.817688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6966f08c119fa12ec00cc3c4a21f53afbaa81b9f641110d2fee076fbe9802dff

Aliases

arxiv: hep-ph/9901405 · arxiv_version: hep-ph/9901405v2 · doi: 10.48550/arxiv.hep-ph/9901405 · pith_short_12: NFTPBDART6QS · pith_short_16: NFTPBDART6QS5QAM · pith_short_8: NFTPBDAR

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/NFTPBDART6QS5QAMYPCKEH2TV6 \
  | 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: 6966f08c119fa12ec00cc3c4a21f53afbaa81b9f641110d2fee076fbe9802dff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b283352441a269045b4869e20ae33939be1dbc2f81f6c7ef43e2a4072d7e9963",
    "cross_cats_sorted": [
      "hep-ex"
    ],
    "license": "",
    "primary_cat": "hep-ph",
    "submitted_at": "1999-01-25T16:46:40Z",
    "title_canon_sha256": "f07ad88e7ab77bda7f5ea87b21ae7b1d09f5aed2da36f9ca08f723d96faa2986"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-ph/9901405",
    "kind": "arxiv",
    "version": 2
  }
}