Pith Number

pith:WL7TOELT

pith:2026:WL7TOELTN3UVXPLSNCL76UW5CY

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Form factors of the $\rho$ meson from effective field theory and the lattice

Ajay S. Sakthivasan, Akaki Rusetsky, Gerrit Schierholz, Jia-Jun Wu, Ulf-G. Mei{\ss}ner

A background electromagnetic field plus the Feynman-Hellmann theorem yields first estimates of the three form factors of the rho meson in effective field theory.

arxiv:2602.23044 v2 · 2026-02-26 · hep-lat · hep-ph · nucl-th

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\usepackage{pith}
\pithnumber{WL7TOELTN3UVXPLSNCL76UW5CY}

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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

By matching the results to Chiral Perturbation Theory, we provide a first, crude estimate of all three form factors of the ρ-meson within the effective field theory. Contact contributions to these form factors turn out to be substantial.

C2weakest assumption

The background-field plus Feynman-Hellmann procedure, validated only on a toy model, extends without major modification to the interacting rho-meson system in effective field theory, and the subsequent matching to chiral perturbation theory faithfully extracts the physical form factors.

C3one line summary

Background-field plus Feynman-Hellmann method in effective field theory yields first crude estimates of the rho meson's three electromagnetic form factors, with substantial contact contributions.

References

58 extracted · 58 resolved · 0 Pith anchors

[1] Meißner, Fernando Romero-L´ opez, Akaki Rusetsky, and Gerrit Schierholz 2022

[2] Gurtler et al 2008

[3] C. Alexandrou, T. Korzec, G. Koutsou, Th. Leontiou, C. Lorce, J. W. Negele, V. Pascalutsa, A. Tsapalis, and M. Vanderhaeghen. ∆-baryon electromagnetic form factors in lattice QCD. Phys. Rev. D, 79:014 2009

[4] Stokes, Waseem Kamleh, and Derek B 2020

[5] Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber, Benjamin J. Menadue, Benjamin J. Owen, and Anthony W. Thomas. Light-quark contributions to the magnetic form factor of the Λ (1405).Phys. Rev. D 2017

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-06-24T01:14:26.605142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2ff3711736ee95bbd726897ff52dd163661c5e9dd0c6d09774007696d8b6645

Aliases

arxiv: 2602.23044 · arxiv_version: 2602.23044v2 · doi: 10.48550/arxiv.2602.23044 · pith_short_12: WL7TOELTN3UV · pith_short_16: WL7TOELTN3UVXPLS · pith_short_8: WL7TOELT

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/WL7TOELTN3UVXPLSNCL76UW5CY \
  | 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: b2ff3711736ee95bbd726897ff52dd163661c5e9dd0c6d09774007696d8b6645

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84321b783ab9dab2192e30197066da9f869f9552a27c7c289949098afaa0690b",
    "cross_cats_sorted": [
      "hep-ph",
      "nucl-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-lat",
    "submitted_at": "2026-02-26T14:27:52Z",
    "title_canon_sha256": "77eedd8b670f42a1f9de2ae90789f38a27959234ec37f9050211799f4fbe41c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.23044",
    "kind": "arxiv",
    "version": 2
  }
}