{
  "abstract": "We investigate static and spherically symmetric black holes in Palatini Kalb-Ramond gravity, where a nonzero vacuum expectation value of the Kalb-Ramond field spontaneously breaks local Lorentz symmetry. Treating the metric and the torsion-free affine connection as independent variables, we derive the modified field equations and obtain an exact family of solutions encompassing positive, vanishing, and negative values of the cosmological constant $Λ$. Unlike the corresponding purely metric formulation, the Palatini theory consistently allows both Lorentz-violating parameters $\\ell_1$ and $\\ell_2$ to be nonzero. Using the Iyer-Wald formalism, we determine the conserved mass of the black hole solutions. For the $Λ\\leq0$ sector, we further verify the first law and the Smarr relation, identifying the conserved mass as the thermodynamic enthalpy. We then confront the $Λ=0$ solution with Mercury's perihelion precession, solar light deflection, and the Shapiro time delay. Once the central mass parameter is calibrated by planetary dynamics, these observables constrain the Lorentz-violating parameters only through $q\\equiv\\ell_2/(1-\\ell_1)$. Among these tests, Mercury's perihelion precession yields the most stringent constraint, $-7.4\\times10^{-12} \\leq q \\leq 3.7\\times10^{-11}$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.05799",
  "author_total": 3,
  "authors": [
    {
      "name": "Lin-Yi She"
    },
    {
      "name": "Rui-Jie Niu"
    },
    {
      "name": "Ke Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d7qt18yzt8j21.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.05799",
  "fulltext_url": null,
  "id": "d7qt18yzt8j21",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.05799",
  "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",
      "gr-qc"
    ],
    [
      "openalex",
      "3109|Noncommutative and Quantum Gravity Theories"
    ]
  ],
  "openalex": "W7220652516",
  "pdf_url": "https://arxiv.org/pdf/2610.05799",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d7qt18yzt8j21.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:01Z",
      "native_id": "2610.05799",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.05799"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Exact black hole solutions in Palatini Kalb-Ramond gravity",
  "title_text": "Exact black hole solutions in Palatini Kalb-Ramond gravity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:01Z",
  "url": "https://research.draconitic.com/paper/d7qt18yzt8j21",
  "venue": "arXiv",
  "versions": []
}