{
  "id": "2101.12028",
  "version": "v1",
  "published": "2021-01-28T14:46:21.000Z",
  "updated": "2021-01-28T14:46:21.000Z",
  "title": "Heavy quark expansion of $Λ_b\\toΛ^*$ form factors beyond leading order",
  "authors": [
    "Marzia Bordone"
  ],
  "comment": "19 pages, 3 figures",
  "categories": [
    "hep-ph"
  ],
  "abstract": "I review the parametrisation of the full set of $\\Lambda_b\\to\\Lambda^* (1520)$ form factors in the framework of Heavy Quark Expansion, including next-to-leading order $\\mathcal{O}(\\alpha_s)$ and for the first time next-to-leading power $\\mathcal{O}(1/m_b)$ corrections. The unknown hadronic parameters are obtained performing a fit to a recent lattice QCD calculations. I investigate the compatibility of the HQE and the current lattice data, finding a tension between these two approaches in the case of tensor and pseudo-tensor form factors, whose origin could come from an underestimation of the current lattice QCD uncertainties and higher order terms in the HQE.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-01-28T14:46:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "heavy quark expansion",
      "leading order",
      "current lattice qcd uncertainties",
      "pseudo-tensor form factors",
      "unknown hadronic parameters"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}