{
  "id": "1804.11289",
  "version": "v1",
  "published": "2018-04-30T16:07:49.000Z",
  "updated": "2018-04-30T16:07:49.000Z",
  "title": "Exclusive decays $χ_{cJ}\\to K^*(892)K$ within the effective field theory framework",
  "authors": [
    "Nikolay Kivel"
  ],
  "comment": "25 pages, 7 figures",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We study hadronic decays $\\chi_{cJ}\\rightarrow K^*(892)\\bar{K} $ within the effective field theory framework. We consider colour-singlet and colour-octet contributions using (p)NRQCD effective theory and study their properties. We show that infrared singularities in collinear integrals of the colour-singlet amplitudes can be absorbed into the colour-octet matrix element. The heavy quark spin symmetry allows us to establish a relation between the colour-octet matrix elements and to compute hard spin symmetry breaking corrections which are free from any infrared divergencies. We apply obtained corrections for a phenomenological description of the measured branching fractions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-04-30T16:07:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "effective field theory framework",
      "exclusive decays",
      "colour-octet matrix element",
      "hard spin symmetry breaking corrections",
      "heavy quark spin symmetry"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 25,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}