Pith Number

pith:QVQBJZ6I

pith:2026:QVQBJZ6IUK26OX5G7GYZQLCLYW

not attested not anchored not stored refs pending

New limits on the Pauli forbidden transitions in 12C nuclei obtained with the complete Borexino dataset

A. Caminata, A. Chepurnov, A. Derbin, A. Di Giacinto, A. Di Ludovico, A. Goretti, A. Jany, Aldo Ianni, Andrea Ianni, A. Pocar, A. Razeto, A. Re, A. Singhal, A. Sotnikov, A. Vishneva, B. Caccianiga, Borexino collaboration, C. Galbiati, C. Ghiano, D. Basilico, D. D Angelo, D. Franco, D. Guffanti, D. Semenov, E. Litvinovich, E. Meroni, E. Unzhakov, F. Ortica, F. von Feilitzsch, G. Bellini, G. Korga, G. Raikov, G. Ranucci, G. Settanta, G. Testera, G. Zuzel, I. Drachnev, I. Lomskaya, I. Machulin, J. Benziger, J. Martyn, K. Zuber, L. Di Noto, L. Ludhova, L. Miramonti, L. Oberauer, L. Pelicci, L. Pietrofaccia, M. Giammarchi, M. Gromov, M. Laubenstein, M. Misiaszek, M. Pallavicini, M. Skorokhvatov, M.T. Ranalli, M. Wojcik, M. Wurm, N. Pilipenko, N. Rossi, O. Penek, O. Smirnov, P. Lombardi, R. Biondi, R.B. Vogelaar, R. Tartaglia, S. Kumaran, S. Schonert, S. Zavatarelli, V. Di Marcello, V. Kobychev, V. Muratova, V. Orekhov, X.F. Ding

Borexino data sets the tightest experimental limits on Pauli-forbidden transitions in 12C nuclei.

arxiv:2604.08950 v2 · 2026-04-10 · nucl-ex · hep-ex · hep-ph

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\usepackage{pith}
\pithnumber{QVQBJZ6IUK26OX5G7GYZQLCLYW}

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Record completeness

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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

The most stringent experimental constraints to date on the lifetime of the 12C nucleus with respect to PEP-forbidden transitions were obtained: tau(12C -> 12C~ + gamma) >= 1.1e32 y, tau(12C -> 11B~ + p) >= 1.0e31 y, and similar for other channels, with delta^2 limits at 90% CL.

C2weakest assumption

The analysis assumes that background events are perfectly modeled and subtracted across all search channels and that the detector efficiency and energy response for any hypothetical signal are accurately known from calibration and simulation.

C3one line summary

Borexino sets new lower limits on Pauli-forbidden transition lifetimes in 12C of 6.4e30 to 1.1e32 years and upper limits on violation strengths delta^2_gamma <=1e-57, delta^2_N <=7e-61, delta^2_beta <=9.6e-36 at 90% CL.

Receipt and verification

First computed	2026-07-02T01:17:30.982847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

856014e7c8a2b5e75fa6f9b1982c4bc59b532a1236ef353a3853258d81e55c33

Aliases

arxiv: 2604.08950 · arxiv_version: 2604.08950v2 · doi: 10.48550/arxiv.2604.08950 · pith_short_12: QVQBJZ6IUK26 · pith_short_16: QVQBJZ6IUK26OX5G · pith_short_8: QVQBJZ6I

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/QVQBJZ6IUK26OX5G7GYZQLCLYW \
  | 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: 856014e7c8a2b5e75fa6f9b1982c4bc59b532a1236ef353a3853258d81e55c33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd0a3254d3eaa59960fb037929b1796c1711058c8915cb2e0a68f9458753bbc6",
    "cross_cats_sorted": [
      "hep-ex",
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "nucl-ex",
    "submitted_at": "2026-04-10T04:44:34Z",
    "title_canon_sha256": "7dfd7a9a3a475d9a766c0edf91867b42bc7379cbc8e711cddc2c6277efe607c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.08950",
    "kind": "arxiv",
    "version": 2
  }
}