Pith Number

pith:Q3HKNL34

pith:2026:Q3HKNL34STDZTEUURQX2O2SVKG

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Global Fit of KamLAND Data and the Daya Bay Antineutrino Energy Spectrum

Guihong Huang

Substituting Daya Bay's measured antineutrino spectra for the Huber-Müller model in a KamLAND analysis lowers the best-fit Δm²₂₁ and improves agreement with JUNO.

arxiv:2605.16915 v1 · 2026-05-16 · hep-ex

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Claims

C1strongest claim

Replacing the Huber-Müller model with the Daya Bay measured antineutrino spectra in a combined analysis with KamLAND data decreases the best-fit Δm²₂₁ from 7.53^{+0.17}_{-0.16}×10^{-5} eV² to 7.50^{+0.19}_{-0.18}×10^{-5} eV² and shows a decreasing trend in tan²θ₁₂, resulting in better agreement with the latest JUNO measurement.

C2weakest assumption

The Daya Bay measured 235U and 239Pu fission antineutrino spectra can be directly substituted into the KamLAND analysis with only weak dependence on the overall reactor flux model and without large additional detector-specific corrections or unaccounted systematics (abstract, paragraph describing the global analysis framework).

C3one line summary

Substituting Daya Bay's measured antineutrino spectra for the Huber-Müller model in a KamLAND global fit lowers best-fit Δm²₂₁ to 7.50 × 10^{-5} eV² and trends tan²θ₁₂ downward, improving agreement with JUNO.

References

14 extracted · 14 resolved · 0 Pith anchors

[1] Combined Analysis of all Three Phases of Solar Neutrino Data from the Sudbury Neu- trino Observatory 2013 · doi:10.1103/physrevc.88.025501

[2] Reactor On-OffAntineutrino Measurement with KamLAND 2013 · doi:10.1103/physrevd.88.033001

[3] A New Lepton - Quark Mass Relation in a Unified Theory

[4] Double Chooz: Latest re- sults 2015 · doi:10.1016/j.nuclphysbps.2015.06.025

[5] Observation of Energy and Base- line Dependent Reactor Antineutrino Disappearance in the RENO Experiment 2016 · doi:10.1103/physrevlett.116.211801

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:03:29.949439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86cea6af7c94c79992948c2fa76a5551af8d467187e917b058c864418a76a278

Aliases

arxiv: 2605.16915 · arxiv_version: 2605.16915v1 · doi: 10.48550/arxiv.2605.16915 · pith_short_12: Q3HKNL34STDZ · pith_short_16: Q3HKNL34STDZTEUU · pith_short_8: Q3HKNL34

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Q3HKNL34STDZTEUURQX2O2SVKG \
  | 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: 86cea6af7c94c79992948c2fa76a5551af8d467187e917b058c864418a76a278

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce9d4f2c09258a590ac93600d52c09bfedf9f703bd952788e78a07f0705cb554",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "hep-ex",
    "submitted_at": "2026-05-16T10:06:11Z",
    "title_canon_sha256": "16760ff6dbb51b41a90286f08fded165d2a3b9ed101b6cb2df6b8e1e0ad48d5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16915",
    "kind": "arxiv",
    "version": 1
  }
}