{
  "id": "hep-ph/0207363",
  "version": "v1",
  "published": "2002-07-31T09:39:43.000Z",
  "updated": "2002-07-31T09:39:43.000Z",
  "title": "Supersymmetric Electroweak Corrections to Heavier Top Squark Decay into Lighter Top Squark and Neutral Higgs Boson",
  "authors": [
    "Qiang Li",
    "Li Gang Jin",
    "Chong Sheng Li"
  ],
  "comment": "37 pages, 19 eps figures",
  "journal": "Phys.Rev. D66 (2002) 115008",
  "doi": "10.1103/PhysRevD.66.115008",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We calculate the Yukawa corrections of order ${\\cal O}(\\alpha_{ew}m_{t(b)}^2/m_W^2)$, ${\\cal O}(\\alpha_{ew}m_{t(b)}^3/m_W^3)$ and ${\\cal O}(\\alpha_{ew}m_{t(b)}^4/m_W^4)$ to the widths of the decays $\\tilde t_2\\to \\tilde t_1 + (h^0,H^0,A^0)$ in the Minimal Supersymmetric Standard Model, and perform a detailed numerical analysis. We also compare the results with the ones presented in an earlier literature, where the ${\\cal O}(\\alpha_{s})$ SUSY-QCD corrections to the same three decay processes have been calculated. Our numerical results show that for the decays $\\tilde t_2\\to \\tilde t_1 + h^{0}$, $\\tilde t_2\\to \\tilde t_1 + H^{0}$, the Yukawa corrections are significant in most of the parameter range, which can reach a few ten percent, and for the decay $\\tilde t_2\\to\\tilde t_1 + A^{0}$, the Yukawa corrections are relatively smaller, which are only a few percent. The numerical calculations also show that using the running quark masses and the running trilinear coupling $A_t$, which include the QCD, SUSY-QCD, SUSY-Electroweak effects and resume all high order ($\\tan\\beta$)-enhanced effects, can vastly improve the convergence of the perturbation expansion. We also discuss the effects of the running of the higgsino mass parameter $\\mu$ on the corrections, and find that they are significant, too, especially for large $\\tan\\beta$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-07-31T09:39:43.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.80.Ly",
      "12.38.Bx",
      "14.80.Cp"
    ],
    "keywords": [
      "neutral higgs boson",
      "supersymmetric electroweak corrections",
      "squark decay",
      "yukawa corrections",
      "minimal supersymmetric standard model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 37,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 591663
    }
  }
}