Pith Number

pith:5NUXLXMH

pith:2026:5NUXLXMHFO22ZI6LJOW6HKIOSP

not attested not anchored not stored refs resolved

Towards Measuring the CP-Violating Phase with Atmospheric Neutrinos

Ho Man Yim, John F. Beacom, Matthew J. Dolan, Nicole F. Bell, Stephan A. Meighen-Berger

An up-down flux ratio of sub-GeV atmospheric neutrinos can measure the CP-violating phase with sensitivity that exceeds T2HK near 90° and 270°.

arxiv:2605.16721 v1 · 2026-05-16 · hep-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5NUXLXMHFO22ZI6LJOW6HKIOSP}

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

For the example of Hyper-Kamiokande, our approach can surpass the sensitivity of the Tokai to Hyper-Kamiokande (T2HK) long-baseline experiment near δ_CP = 90° and 270°.

C2weakest assumption

Realizing this potential will require additional, but realistic, work to reduce theoretical uncertainties. This premise enters in the final paragraph of the abstract and is load-bearing because the claimed sensitivity gain is stated to depend on successfully lowering those uncertainties without new systematics.

C3one line summary

A new up-down flux ratio for sub-GeV atmospheric neutrinos enables Hyper-Kamiokande to measure the CP-violating phase with sensitivity surpassing T2HK near delta_CP of 90 and 270 degrees.

References

89 extracted · 89 resolved · 33 Pith anchors

[1] These points were largely known

[2] The angular ranges are chosen to reduce the smearing between up and downgo- ing samples while maintaining good statistics

[3] The remaining parameters (not shown),θ 12 and ∆m2 32, have an even smaller impact due to the averaging of oscillation phases over energy and zenith angle

[4] Steigman, Observational tests of antimatter cosmolo- gies, Ann 1976

[5] The origin of the matter-antimatter asymmetry 2003 · arXiv:hep-ph/0303065

Formal links

1 machine-checked theorem link

Receipt and verification

First computed	2026-05-20T00:02:38.393444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb6975dd872bb5aca3cb4bade3a90e93f6b8bfbb7415012ac0c56e1926677ac7

Aliases

arxiv: 2605.16721 · arxiv_version: 2605.16721v1 · doi: 10.48550/arxiv.2605.16721 · pith_short_12: 5NUXLXMHFO22 · pith_short_16: 5NUXLXMHFO22ZI6L · pith_short_8: 5NUXLXMH

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/5NUXLXMHFO22ZI6LJOW6HKIOSP \
  | 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: eb6975dd872bb5aca3cb4bade3a90e93f6b8bfbb7415012ac0c56e1926677ac7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f2cef6ba1adc1568fd03c23c4040656087fab9ef508a17554168649ba1b79ede",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-05-16T00:07:50Z",
    "title_canon_sha256": "5c14b9052a4aa5920ea8d6de10c2b2da30c03ffab532215b393e60a8dd3e6071"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16721",
    "kind": "arxiv",
    "version": 1
  }
}