Pith Number

pith:MX7N77KI

pith:2019:MX7N77KIYJHINKVBJL6ZV26YWG

not attested not anchored not stored refs pending

Cosmological Constraint on Dark Photon from $N_{\rm eff}$

Masahiro Ibe, Satoshi Shirai, Shin Kobayashi, Yuhei Nakayama

arxiv:1912.12152 v3 · 2019-12-27 · 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{MX7N77KIYJHINKVBJL6ZV26YWG}

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.

Cited by

3 papers in Pith

Dark Photons from Red Dwarfs

Probing Dark Photons from Nuclear De-excitation in Reactor Neutrino Experiment

Consistent $N_{\rm eff}$ fitting in big bang nucleosynthesis analysis

Receipt and verification

First computed	2026-07-05T01:38:56.806878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65fedffd48c24e86aaa14afd9aebd8b180e63f2a921579de4d76a6bd829bc043

Aliases

arxiv: 1912.12152 · arxiv_version: 1912.12152v3 · doi: 10.48550/arxiv.1912.12152 · pith_short_12: MX7N77KIYJHI · pith_short_16: MX7N77KIYJHINKVB · pith_short_8: MX7N77KI

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/MX7N77KIYJHINKVBJL6ZV26YWG \
  | 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: 65fedffd48c24e86aaa14afd9aebd8b180e63f2a921579de4d76a6bd829bc043

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "816a48f8b19caaa4b816784ada48aeed2e30a512d6f4e8216e337a9cd4d4c3a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2019-12-27T15:21:35Z",
    "title_canon_sha256": "bc60d4a9e98a57a77511463cb36965a18fdcda04bd5930674d8495cc0af1b208"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.12152",
    "kind": "arxiv",
    "version": 3
  }
}