{
  "abstract": "The nucleon axial form factor $F_A(Q^2)$ is a primary source of systematic uncertainty in charged-current quasielastic interactions, of critical importance for long-baseline neutrino-oscillation studies. Its low-$Q^2$ behavior is particularly problematic to pin down in neutrino measurements. To address this limitation, we investigate the weak process of polarized positron capture on the deuteron, $\\vec{e}^{\\,+} + {}^2\\text{H} \\rightarrow \\barν_e + p + p$. Employing a relativistic momentum-space formalism, we present predictions for the total cross section. Focusing on the kinematic regime free from pion-production backgrounds, we analyze various differential cross sections and their sensitivity to the $F_A(Q^2)$ variation. Our results demonstrate that thanks to the positron upgrade, Jefferson Lab will gain a unique position to make inroads into determining the low-$Q^2$ behavior of the axial form factor.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.22435",
  "author_total": 10,
  "authors": [
    {
      "name": "A. M. Ankowski"
    },
    {
      "name": "J. Golak"
    },
    {
      "name": "E. Pérez del Rio"
    },
    {
      "name": "S. Sharma"
    },
    {
      "name": "R. Skibiński"
    },
    {
      "name": "K. Topolnicki"
    },
    {
      "name": "H. Witała"
    },
    {
      "name": "W. N. Polyzou"
    },
    {
      "name": "H. Kamada"
    },
    {
      "name": "D. Dutta"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f9nz6ebd7m4z5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22435",
  "fulltext_url": null,
  "id": "f9nz6ebd7m4z5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22435",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-ex"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Neutrino Physics Research"
    ]
  ],
  "openalex": "W7214013068",
  "pdf_url": "https://arxiv.org/pdf/2609.22435",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f9nz6ebd7m4z5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.22435",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22435"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Probing the nucleon axial form factor via the $\\vec{e}^{\\,+} + {}^2\\text{H} \\rightarrow \\barν_e + p + p$ reaction below the pion-production threshold",
  "title_text": "Probing the nucleon axial form factor via the e⃗^ + + ^2H → ν̅_e + p + p reaction below the pion-production threshold",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/f9nz6ebd7m4z5",
  "venue": "arXiv",
  "versions": []
}