{
  "abstract": "Nucleon sigma terms are important for the decomposition of the nucleon mass and for searches for new physics beyond the Standard Model involving scalar interactions. A persistent tension between lattice QCD and phenomenological determinations may be due to uncontrolled excited-state contamination in lattice QCD analyses. In previous work at $m_π=429~\\rm MeV$, we showed that this contamination is dominated by $Nσ$ states and can be strongly suppressed with a variational analysis using $N$ and $Nσ$ operators. In this talk, we present preliminary results at $m_π=222~\\rm MeV$, where the $σ$ becomes unstable and decays into $ππ$. We investigate whether the same small variational basis can remove the expected $Nππ$ contamination through the overlap of the $Nσ$ operator with these states.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.05989",
  "author_total": 4,
  "authors": [
    {
      "name": "Lorenzo Barca"
    },
    {
      "name": "Gunnar Bali"
    },
    {
      "name": "Sara Collins"
    },
    {
      "name": "Marcel Rodekamp"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5hqgkayzjz7w7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.05989",
  "fulltext_url": null,
  "id": "5hqgkayzjz7w7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.05989",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-lat"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.05989",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5hqgkayzjz7w7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.05989",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.05989"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-lat",
      "subfield": "high-energy"
    }
  ],
  "title": "Nucleon-sigma terms at $m_π=222 ~\\rm MeV$ with a variational analysis from lattice QCD",
  "title_text": "Nucleon-sigma terms at m_π=222 MeV with a variational analysis from lattice QCD",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/5hqgkayzjz7w7",
  "venue": "arXiv",
  "versions": []
}