Pith Number

pith:PJ3LOZP7

pith:2026:PJ3LOZP7V3X3ZFPAWAY5KDCID5

not attested not anchored not stored refs pending

Measurement of di-muons from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

The SHiP Collaboration

Bμμ σ(J/ψ)/A = (1.18 ± 0.04 ± 0.10) nb/nucleon for 0.3 < y_cm < 0.6 in thick target, consistent with NA50 thin-target result within errors and limiting cascade contributions to <32%.

arxiv:2604.03661 v2 · 2026-04-04 · hep-ex

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PJ3LOZP7V3X3ZFPAWAY5KDCID5}

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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.

Claims

C1strongest claim

For 0.3 < y_cm < 0.6, Bμμ σ(J/ψ)/A = (1.18 ± 0.04 ± 0.10) nb/nucleon; within systematic errors no significant enhancement due to secondary production of J/ψ inside the target is observed, with upper limit of possible contributions from cascade collisions of <32%.

C2weakest assumption

That the Pythia v8 Monte Carlo accurately models both primary production and the effects of the thick target geometry, and that differences in target thickness and acceptance between this measurement and NA50 do not introduce unaccounted biases in the comparison.

C3one line summary

Bμμ σ(J/ψ)/A = (1.18 ± 0.04 ± 0.10) nb/nucleon for 0.3 < y_cm < 0.6 in thick target, consistent with NA50 thin-target result within errors and limiting cascade contributions to <32%.

Receipt and verification

First computed	2026-06-23T03:13:56.918684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a76b765ffaeefbc95e0b031d50c481f4b389d9195cd5df194c32ece70aeee94

Aliases

arxiv: 2604.03661 · arxiv_version: 2604.03661v2 · doi: 10.48550/arxiv.2604.03661 · pith_short_12: PJ3LOZP7V3X3 · pith_short_16: PJ3LOZP7V3X3ZFPA · pith_short_8: PJ3LOZP7

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/PJ3LOZP7V3X3ZFPAWAY5KDCID5 \
  | 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: 7a76b765ffaeefbc95e0b031d50c481f4b389d9195cd5df194c32ece70aeee94

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6a69053ea1656145f3c447d1db8d7e2f4e4f26e0648be2e99de86d2b4acddb7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-ex",
    "submitted_at": "2026-04-04T09:28:09Z",
    "title_canon_sha256": "f1774231bd7d88f46a82a7b2042c6c2e8b62e02a847f7dffe1f16c04c035fb19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.03661",
    "kind": "arxiv",
    "version": 2
  }
}