Pith Number

pith:CTRJZYVA

pith:2026:CTRJZYVA4DWQYZYB44TI6VICZB

not attested not anchored not stored refs pending

Pion Weak Decay in a Magnetic Field

Brian C. Tiburzi, Prabal Adhikari

Chiral perturbation theory calculation of pion decay in a magnetic field agrees with lattice QCD at large field strengths, with weak-field differences traced to pion decay constant values.

arxiv:2604.10314 v2 · 2026-04-11 · hep-ph · hep-lat

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\usepackage{pith}
\pithnumber{CTRJZYVA4DWQYZYB44TI6VICZB}

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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

While the results are consistent for large magnetic fields, the discrepancy observed for weak magnetic fields is largely due to differences in the pion decay constants.

C2weakest assumption

The assumption that the chiral perturbation theory framework remains valid and accurate for describing the pion decay in the presence of a magnetic field across the range of field strengths considered, particularly at weak fields where higher-order effects might play a role.

C3one line summary

Chiral perturbation theory predicts pion decay widths in magnetic fields that match lattice QCD at large field strengths but differ at weak fields primarily due to variations in the pion decay constant.

Receipt and verification

First computed	2026-06-01T02:03:40.425005Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

14e29ce2a0e0ed0c6701e7268f5502c840becbc55339420f7cc551b62ccec70a

Aliases

arxiv: 2604.10314 · arxiv_version: 2604.10314v2 · doi: 10.48550/arxiv.2604.10314 · pith_short_12: CTRJZYVA4DWQ · pith_short_16: CTRJZYVA4DWQYZYB · pith_short_8: CTRJZYVA

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/CTRJZYVA4DWQYZYB44TI6VICZB \
  | 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: 14e29ce2a0e0ed0c6701e7268f5502c840becbc55339420f7cc551b62ccec70a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb3e93bdeee3f18318b8e49e38b2e4b1e8f3ee026fec1b994ef82a42db2b129e",
    "cross_cats_sorted": [
      "hep-lat"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-04-11T18:35:15Z",
    "title_canon_sha256": "3256e5777d8f9bca798ae74bfd3babd8e79e6a9a7a9482fcbfaa8a24ed998c17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.10314",
    "kind": "arxiv",
    "version": 2
  }
}