{
  "abstract": "Antineutrinos produce hyperons without kaons through Cabibbo-suppressed quasi-elastic scattering on a single nucleon. A two-body current acting on a correlated nucleon pair, nubar [NN] -> l+ Y N', gives the same hyperons plus a second nucleon. A companion paper constructs this current without fixing its size. StrangeMC, the only generator with the channel, set it to a flat 15% of the quasi-elastic hyperon cross section. We determine the ratio f = sigma_2p2h/sigma_QE of the two-body to the quasi-elastic hyperon cross section on carbon versus antineutrino energy, and the detector signatures of two-body events. The strange two-body current and its non-strange counterpart are computed on the same nucleon pair. Their ratio is converted into f with the Valencia non-strange 2p2h and quasi-elastic cross sections for carbon, assuming that nuclear effects missing from the pair are common to both. Under this assumption f rises from 0.14 at 0.6 GeV to 0.20-0.22 at 2-5 GeV. Averaged over the Booster antineutrino spectra it is 0.15-0.17, close to the 15% placeholder, which StrangeMC now replaces with f(E). The largest evaluated uncertainty comes from separating the two-body current from one-body production followed by rescattering: across the separation prescriptions explored, f at 1 GeV ranges from 0.12 to 0.22. Interference with one-body production is not calculated and could be as large as the two-body rate. In a simulated SBND antineutrino-mode exposure on argon with the carbon f, two-body events are about 11% of events that produce a strange hadron. They supply more than a quarter of the kaon-less Sigma+ events used to tag hyperon charge exchange, partly as Sigma+ made at the weak vertex. They reconstruct 12-30% low in energy under the quasi-elastic hypothesis. After final-state interactions half of them have a proton above 40 MeV at the vertex, against a fifth of quasi-elastic events.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.36906",
  "author_total": 1,
  "authors": [
    {
      "name": "Jarosalw A. Nowak"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3a45ekbkp20k7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.36906",
  "fulltext_url": null,
  "id": "3a45ekbkp20k7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.36906",
  "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",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Neutrino Physics Research"
    ]
  ],
  "openalex": "W7224108485",
  "pdf_url": "https://arxiv.org/pdf/2610.36906",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3a45ekbkp20k7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.36906",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.36906"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Phenomenology of strangeness-changing two-body currents in antineutrino scattering",
  "title_text": "Phenomenology of strangeness-changing two-body currents in antineutrino scattering",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/3a45ekbkp20k7",
  "venue": "arXiv",
  "versions": []
}