{
  "abstract": "We study light top-flavoured dark matter (DM) below the electroweak (EW) scale within the dark Standard Model effective field theory (DSMEFT). We perform the one-loop matching of the DSMEFT onto the dark low-energy effective field theory (DLEFT) at the EW scale for all relevant operators that couple scalar, fermionic or vector DM, as well as axion-like particles, exclusively to third-generation quarks. After QCD evolution to the relevant low-energy scales, we match the DLEFT onto the non-relativistic EFT for DM-nucleus scattering. This EFT chain provides a unified framework for phenomenological studies of rare $B$- and $K$-meson decays with missing energy, direct and indirect detection, and the thermal relic abundance. Interpreting the Belle II excess in $B^+\\to K^+ν\\barν$ as a decay into DM, we find that only the DSMEFT operators contributing at tree level can accommodate it with $O(1)$ couplings for a new-physics scale of $1\\,\\mathrm{TeV}$. The decay $B^0\\to K^{*0}+\\mathrm{inv}$ provides the strongest constraint over large portions of the Belle II-favoured parameter space, while $K^+\\toπ^++\\mathrm{inv}$ can dominate at low and $B_s\\to\\mathrm{inv}$, $B^+\\toπ^++\\mathrm{inv}$ and $Υ(1S)\\to\\mathrm{inv}$ become important at high DM masses, respectively. Direct-detection searches by CRESST-III and DarkSide-50 are competitive for operators involving scalar quark currents and, depending on the operator, exclude the Belle~II-favoured band for $m_{\\mathrm{DM}}\\gtrsim1$-$2\\,\\mathrm{GeV}$. We also perform detailed analyses of the thermal relic abundance and the indirect-detection constraints from the CMB and Fermi-LAT.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.34880",
  "author_total": 5,
  "authors": [
    {
      "name": "Meng-Chao Gao"
    },
    {
      "name": "Xin-Qiang Li"
    },
    {
      "name": "Ya-Dong Yang"
    },
    {
      "name": "Xing-Bo Yuan"
    },
    {
      "name": "Xin Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2ewmr7363gy1p.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.34880",
  "fulltext_url": null,
  "id": "2ewmr7363gy1p",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.34880",
  "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-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7223961240",
  "pdf_url": "https://arxiv.org/pdf/2610.34880",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2ewmr7363gy1p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.34880",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.34880"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Light top-flavoured dark matter in dark SMEFT: one-loop matching and phenomenology",
  "title_text": "Light top-flavoured dark matter in dark SMEFT: one-loop matching and phenomenology",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/2ewmr7363gy1p",
  "venue": "arXiv",
  "versions": []
}