Pith Number

pith:HLVQLJRL

pith:2026:HLVQLJRLZ7NEO4DVCDB36D22SD

not attested not anchored not stored refs resolved

Chiral interactions and superfluidity in the calcium isotopic chain

A. Ekstr\"om, A. Scalesi, C. Forss\'en, G. Hagen

Bayesian calibration of third-order chiral interactions leaves neutron pairing gaps in calcium isotopes too small.

arxiv:2601.20942 v2 · 2026-01-28 · nucl-th

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\pithnumber{HLVQLJRLZ7NEO4DVCDB36D22SD}

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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

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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

We find that pairing gaps remain largely unaffected, leaving the explanation of nuclear superfluidity as a future task for improved many-body modeling and refined interactions at higher chiral orders.

C2weakest assumption

The assumption that mean-field level calculations combined with third-order chiral interactions and the chosen Bayesian posterior sampling are sufficient to conclude that the discrepancy originates outside the interaction calibration.

C3one line summary

Neutron pairing gaps in calcium isotopes are insensitive to variations in third-order chiral interactions, indicating that nuclear superfluidity requires improved many-body modeling or higher-order terms.

References

54 extracted · 54 resolved · 0 Pith anchors

[1] L. N. Cooper, R. L. Mills, and A. M. Sessler, Possible Su- perfluidity of a System of Strongly Interacting Fermions, Phys. Rev.114, 1377 (1959) 1959

[2] D. J. Dean and M. Hjorth-Jensen, Pairing in nuclear sys- tems: from neutron stars to finite nuclei, Rev. Mod. Phys. 75, 607 (2003) 2003

[3] T. Duguet, P. Bonche, P.-H. Heenen, and J. Meyer, Pair- ing correlations. i. description of odd nuclei in mean-field theories, Phys. Rev. C65, 014310 (2001) 2001

[4] T. Duguet, P. Bonche, P.-H. Heenen, and J. Meyer, Pair- ing correlations. ii. microscopic analysis of odd-even mass staggering in nuclei, Phys. Rev. C65, 014311 (2001) 2001

[5] T. Duguet, B. Bally, and A. Tichai, Zero-pairing limit of Hartree-Fock-Bogoliubov reference states, Phys. Rev. C 102, 054320 (2020) 2020

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:00.147300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3aeb05a62bcfda47707510c3bf0f5a90d6990b2996e5bb7972c348d78920002d

Aliases

arxiv: 2601.20942 · arxiv_version: 2601.20942v2 · doi: 10.48550/arxiv.2601.20942 · pith_short_12: HLVQLJRLZ7NE · pith_short_16: HLVQLJRLZ7NEO4DV · pith_short_8: HLVQLJRL

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/HLVQLJRLZ7NEO4DVCDB36D22SD \
  | 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: 3aeb05a62bcfda47707510c3bf0f5a90d6990b2996e5bb7972c348d78920002d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2723cc0cbbfabf7bda3f5903edef4d4b1692ca0c0b3071cf31f6aa26746bb254",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nucl-th",
    "submitted_at": "2026-01-28T19:00:02Z",
    "title_canon_sha256": "86478591c78588aba8071bd525c6dd97cde532b8f58b62adbda20e04ff5bc9a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.20942",
    "kind": "arxiv",
    "version": 2
  }
}