{
  "abstract": "We perform the first $k$-cut cosmic shear analysis of the KiDS-Legacy survey. This method uses the Bernardeau-Nishimichi-Taruya (BNT) transform to construct weak-lensing kernels that are more localised than conventional ones, and remove information from selected physical scales while retaining the constraining power of the targeted range. Removing the scale of $k \\geq 0.33~\\mathrm{Mpc}^{-1}$ from the KiDS-Legacy pseudo-$C_\\ell$ data vector, and using a covariance matrix whose Gaussian component is computed from the theoretical data vector, we find $S_8 = 0.798_{-0.045}^{+0.045}$. This agrees with both the fiducial KiDS-Legacy bandpower result and our no-$k$-cut pseudo-$C_\\ell$ posterior to within $0.1σ$, indicating no significant bias from nonlinear astrophysical feedback at the precision of KiDS-Legacy. We also study the case in which the Gaussian covariance is computed from the observed data vector. In this setup, the same scale cut of $k < 0.33~\\mathrm{Mpc}^{-1}$ gives a much lower $S_8=0.717_{-0.046}^{+0.047}$. Further $k$-cut tests reveal a mild scale-dependent trend, with larger physical scales preferring lower $S_8$ values and a maximum low- versus high-$k$ deviation of $1.80σ$. Mock tests show that this behaviour is not produced by the covariance prescription or data vector alone, but may arise from their interplay. These results show that BNT $k$-cuts provide both a mitigation strategy for nonlinear systematics and a diagnostic of weak-lensing inference pipelines.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Published in Phys.Rev.D 114 (2026) 8, 083535",
  "arxiv": "2607.04384",
  "author_total": 13,
  "authors": [
    {
      "name": "Shiming Gu"
    },
    {
      "name": "Ziang Yan"
    },
    {
      "name": "Ludovic van Waerbeke"
    },
    {
      "name": "Francis Bernardeau"
    },
    {
      "name": "Hendrik Hildebrandt"
    },
    {
      "name": "Angus H Wright"
    },
    {
      "name": "Maciej Bilicki"
    },
    {
      "name": "Christos Georgiou"
    },
    {
      "name": "Shun-Sheng Li"
    },
    {
      "name": "Laila Linke"
    },
    {
      "name": "Lauro Moscardini"
    },
    {
      "name": "Robert Reischke"
    },
    {
      "name": "Benjamin Stölzner"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9g8mfwwnffanz.bib",
  "cited_by": 0,
  "doi": "10.1103/lfs2-d8xd",
  "fulltext_url": null,
  "id": "9g8mfwwnffanz",
  "issns": [],
  "landing_url": "https://hal.science/hal-05734226v1",
  "language": "en",
  "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",
      "astro-ph.CO"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7212067206",
  "pdf_url": "https://arxiv.org/pdf/2607.04384",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9g8mfwwnffanz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "hal-05734226",
      "source": "hal",
      "url": "https://hal.science/hal-05734226v1"
    },
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2607.04384",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.04384"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "KiDS-Legacy: The consistency test of the large-scale structure with Bernardeau-Nishimichi-Taruya transform",
  "title_text": "KiDS-Legacy: The consistency test of the large-scale structure with Bernardeau-Nishimichi-Taruya transform",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/9g8mfwwnffanz",
  "venue": "Phys.Rev.D",
  "versions": [
    {
      "doi": "10.1103/lfs2-d8xd",
      "pid": "9g8mfwwnffanz",
      "relation": "published-as",
      "title": "KiDS-Legacy: The consistency test of the large-scale structure with Bernardeau-Nishimichi-Taruya transform",
      "venue": "Phys.Rev.D"
    }
  ]
}