Pith Number

pith:GTW3DQNH

pith:2026:GTW3DQNHARM7OKNPN6574WO7LD

not attested not anchored not stored refs resolved

Pulse shape discrimination for $\alpha$ event rejection in BEGe-type high-purity germanium detectors

Alex Biondi, Grzegorz Zuzel, Krzysztof Szczepaniec, Marcin Misiaszek, Tomasz Mr\'oz

Classifiers trained only on gamma-ray pulse shapes can reject alpha events in germanium detectors with over 27,000-to-1 efficiency while preserving more than 80% of signal-like events.

arxiv:2605.13498 v1 · 2026-05-13 · physics.ins-det · hep-ex

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\pithnumber{GTW3DQNHARM7OKNPN6574WO7LD}

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Record completeness

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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 multilayer perceptron provides the best overall performance, with a signal-like event survival greater than 80%, a background-like event survival below 20%, and an α-rejection factor exceeding 2.71×10^4.

C2weakest assumption

That the pulse shapes produced by 209Po and 210Po alphas deposited on a thin gold foil on the p+ surface are representative of the alpha events that will occur in the actual LEGEND-style detector during long-term underground operation.

C3one line summary

Gamma-only trained multilayer perceptron and likelihood classifiers achieve >2.71e4 alpha rejection in BEGe detectors with >80% signal survival and <20% background survival.

References

25 extracted · 25 resolved · 0 Pith anchors

[1] CUPID Collaboration, Phys. Rev. Lett.129, 111801 (2022). DOI 10.1103/PhysRevLett.129.111801 2022 · doi:10.1103/physrevlett.129.111801

[2] NEMO Collaboration, Phys. Rev. D92, 072011 (2015). DOI 10.1103/PhysRevD.92.072011 2015 · doi:10.1103/physrevd.92.072011

[3] AMoRE Collaboration, Phys. Rev. Lett.134, 082501 (2025). DOI 10.1103/PhysRevLett.134.082501 2025 · doi:10.1103/physrevlett.134.082501

[4] DOI 10.1140/epjc/ s10052-022-10942-5 2022 · doi:10.1140/epjc/

[5] doi:10.1126/science.adp6474 2025 · doi:10.1126/science.adp6474

Receipt and verification

First computed	2026-05-18T02:44:41.045950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

34edb1c1a70459f729af6fbbfe59df58c17b75575be9ebe92888514865df411e

Aliases

arxiv: 2605.13498 · arxiv_version: 2605.13498v1 · doi: 10.48550/arxiv.2605.13498 · pith_short_12: GTW3DQNHARM7 · pith_short_16: GTW3DQNHARM7OKNP · pith_short_8: GTW3DQNH

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/GTW3DQNHARM7OKNPN6574WO7LD \
  | 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: 34edb1c1a70459f729af6fbbfe59df58c17b75575be9ebe92888514865df411e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9938373ac76869b121c2c356abf4116e4eaf479a18ef42225b51b57f9543bee9",
    "cross_cats_sorted": [
      "hep-ex"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2026-05-13T13:20:52Z",
    "title_canon_sha256": "d57208a0bc88cc48e86321835d9d7accc8da7944a5b0ae13a01763f697e1b354"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13498",
    "kind": "arxiv",
    "version": 1
  }
}