{
  "abstract": "The recent measurement of the branching ratio of $B^+ \\to K^+ + \\mathrm{inv}$ (where ``inv'' denotes invisible states) by the Belle II collaboration is enhanced relative to the standard model expectation by 2.7$σ$. An older puzzle persists in measurements of the branching ratios and CP asymmetries of $B \\to πK $ decays. We address these two anomalies in flavor-changing neutral current $B$ decays, with a short-lived axion-like particle (ALP) with mass close to that of the $π^0$. In the model with the minimum number of new couplings, the ALP has couplings to the photon, top quark and a heavy sterile neutrino. The ALP contributes to the $B \\to π^0 K $ decays by mixing with the $π^0$. It contributes to $B^+ \\to K^+ + \\mathrm{inv}$ by its off-shell coupling to sterile neutrino pairs. The model can explain the excess in the total rate, but not the observed distribution of signal events. We make predictions for all $B \\to K^{(*)} + \\mathrm{inv}$ modes and for the rare kaon decays, $K^+ \\to π^+ + \\mathrm{inv}$ and $K_L \\to π^0 + \\mathrm{inv}$. We find an appreciable contribution to the magnetic moment of the muon, and negligible contributions to the magnetic moment of the electron and $b \\to s e^+ e^-$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 035046 (2026)",
  "arxiv": "2605.24713",
  "author_total": 4,
  "authors": [
    {
      "name": "Bhubanjyoti Bhattacharya"
    },
    {
      "name": "Alakabha Datta"
    },
    {
      "name": "Girish Kumar"
    },
    {
      "name": "Danny Marfatia"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/38svezb36dw95.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.24713",
  "fulltext_url": null,
  "id": "38svezb36dw95",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.24713",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.24713",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/38svezb36dw95.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2605.24713",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.24713"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Axion-like particles and sterile neutrinos solve the $B\\to Kν\\barν$ and $B\\to πK$ puzzles",
  "title_text": "Axion-like particles and sterile neutrinos solve the B→ Kνν̅ and B→ πK puzzles",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/38svezb36dw95",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/gd5l-gjrz",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}