{
  "id": "hep-ph/0307122",
  "version": "v2",
  "published": "2003-07-08T18:46:38.000Z",
  "updated": "2004-02-16T13:22:39.000Z",
  "title": "Two-loop renormalization of the electric charge in the Standard Model",
  "authors": [
    "Giuseppe Degrassi",
    "Alessandro Vicini"
  ],
  "comment": "13 pages; 1 figure; version to appear on Physical Review D",
  "journal": "Phys.Rev. D69 (2004) 073007",
  "doi": "10.1103/PhysRevD.69.073007",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We discuss the renormalization of the electric charge at the two-loop level in the Standard Model of the electroweak interactions. We explicitly calculate the expression of the complete on-shell two-loop counterterm using the Background Field Method and discuss the advantages of this computational approach. We consider the related quantity $\\hat e(\\mu)$, defined in the $\\ms$ renormalization scheme and present numerical results for different values of the scale $\\mu$. We find that the full 2-loop electroweak corrections contribute more than 10 parts in units $10^{-5}$ to the $\\Delta \\hat\\alpha (\\mz^2)$ parameter, obtaining $\\hat\\alpha^{-1}(\\mz)= 128.12 \\pm 0.05$ for $\\Delta\\alpha_{had}(\\mz^2) =0.027572 \\pm 0.000359$.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-02-16T13:22:39.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "12.15.Lk"
    ],
    "keywords": [
      "standard model",
      "electric charge",
      "two-loop renormalization",
      "complete on-shell two-loop counterterm",
      "electroweak corrections contribute"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 623028
    }
  }
}