Pith Number

pith:NVSAF67F

pith:2026:NVSAF67F2BRBVNMUSIHQLHACMD

not attested not anchored not stored refs pending

Radon-induced backgrounds in the NEXT-100 experiment

A. Brodoline, A. Castillo, A.F.B. Isabel, A. Larumbe, A.L.M. Silva, A. Marauri, A. Mart\'inez, A. Para, A. Pazos, A.P. Marques, A. Sim\'on, A. Trettin, A. Yubero-Navarro, B.J.P. Jones, B. Palmeiro, B. Romeo, C.A.N. Conde, C.A.O. Henriques, C.D.R. Azevedo, C. Echeverria, C. Herv\'es Carrete, C.M.B. Monteiro, C. Rogero, C. Romo-Luque, C. Tonnel\'e, D.R. Nygren, E. Church, E. Dey, E. Oblak, E. Ruiz-Ch\'oliz, F. Auria-Luna, F. Ballester, F.I.G.M. Borges, F.J. Mora, F. Kellerer, F. Lopez, F. Monrabal, F.P. Coss\'io, F.P. Santos, F.W. Foss, G. Mart\'inez-Lema, H. Almaz\'an, I.J. Arnquist, I. Osborne, I. Parmaksiz, I. Rivilla, I. Shomroni, J.A. Hernando Morata, J.D. Villamil, J.E. Barcelon, J.F.C.A. Veloso, J.F. Toledo, J. Garc\'ia-Barrena, J. Hauptman, J.J. G\'omez-Cadenas, J. Mart\'in-Albo, J.M. Benlloch-Rodr\'iguez, J.M.F. dos Santos, J. Molina-Canteras, J.M.R. Teixeira, J. Palacio, J. Pelegrin, J. Renner, J. Soto-Oton, J. Torrent, J. Waiton, J.W.R. Grocott, K.E. Navarro, K. Mistry, L. Arazi, L. Larizgoitia, L.M.P. Fernandes, L.M. Villar Padruno, L. Rogers, M. Cid, M. del Barrio-Torregrosa, M. Elorza, M. Mart\'inez-Vara, M. P\'erez Maneiro, M. Querol, M. Seemann, M. Sorel, M. Vanga, N. Byrnes, NEXT Collaboration: C. Cortes-Parra, N. L\'opez-March, P.A.O.C. Silva, P. Dietz, P. Ferrario, P. Ferrero Manche\~no, P. Herrero-G\'omez, P. Lebrun, P. Novella, P.R.G. Valle, P. Saharia, P. V\'azquez Cabaleiro, R. Coupe, R.D.P. Mano, R. Esteve, R. Felkai, R. Guenette, R.L. Miller, R. Madigan, S. Ayet, S.R. Soleti, S. Teruel-Pardo, S. Torelli, V. \'Alvarez, V. Herrero, X. Cid, Y. Ayyad, Y. Ifergan, Z. Freixa

The radon-induced background index in NEXT-100 drops to ~4×10^{-5} counts/(keV·kg·yr) after a topological cut selecting single double-electron tracks in the 0νββ region of interest.

arxiv:2604.19616 v3 · 2026-04-21 · 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{NVSAF67F2BRBVNMUSIHQLHACMD}

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.

Claims

C1strongest claim

The radon-induced background index in the neutrinoless double beta decay region of interest is reduced to ~4×10^{-5} counts/(keV·kg·yr) by applying a topological selection requiring only one double-electron-like track, which is one order of magnitude below the total radiogenic background expectation in NEXT-100.

C2weakest assumption

That the observed events above 400 keV are correctly attributed to Bi-214 from Rn-222 progeny plate-out on the cathode, and that the efficiencies for fully contained events and the topological selection are accurately modeled without significant bias or unaccounted systematics.

C3one line summary

NEXT-100 measures internal Rn-222 activity at 0.95 Bq/m³ with no Rn-220 detected, yielding a Bi-214 rate of 0.97 Hz above 400 keV and a background index of ~4×10^{-5} counts/(keV·kg·yr) in the 0νββ ROI after topological selection.

Receipt and verification

First computed	2026-06-19T16:11:23.736250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d6402fbe5d0621ab594920f059c0260dc726b80e011b66195fd6fd70582122b

Aliases

arxiv: 2604.19616 · arxiv_version: 2604.19616v3 · doi: 10.48550/arxiv.2604.19616 · pith_short_12: NVSAF67F2BRB · pith_short_16: NVSAF67F2BRBVNMU · pith_short_8: NVSAF67F

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/NVSAF67F2BRBVNMUSIHQLHACMD \
  | 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: 6d6402fbe5d0621ab594920f059c0260dc726b80e011b66195fd6fd70582122b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb31d6c7b8df72ee01a6ade596ac2e83d2aea8bf81c239e96ecbadbeb9f067b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ex",
    "submitted_at": "2026-04-21T16:04:32Z",
    "title_canon_sha256": "4509c37e5b9e125dd1abad0b5c434c06a2f5c4c967ad6cc34668df91c34c2739"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.19616",
    "kind": "arxiv",
    "version": 3
  }
}