{
  "id": "hep-ph/0403017",
  "version": "v2",
  "published": "2004-03-01T19:49:45.000Z",
  "updated": "2004-10-20T14:52:32.000Z",
  "title": "Anomaly-matching and Higgs-less effective theories",
  "authors": [
    "Johannes Hirn",
    "Jan Stern"
  ],
  "comment": "Keywords: Anomalies in Field and String Theories, Spontaneous Symmetry Breaking, Beyond the Standard Model, Chiral Lagrangians. 33 pages, 7 figures",
  "journal": "JHEP0409:058,2004",
  "doi": "10.1088/1126-6708/2004/09/058",
  "categories": [
    "hep-ph",
    "hep-th"
  ],
  "abstract": "We reconsider the low-energy effective theory for Higgs-less electroweak symmetry breaking: we study the anomaly-matching in the situation where all Goldstone fields disappear from the spectrum as a result of the Higgs mechanism. We find that the global SU(2)_L x SU(2)_R x U(1)_{B-L} symmetry of the underlying theory, which is spontaneously broken to SU(2)_{L+R} x U(1)_{B-L} has to be anomaly-free. For the sake of generality, we include the possibility of light spin-1/2 bound states resulting from the dynamics of the strongly-interacting symmetry-breaking sector, in addition to the Goldstone bosons. Such composite fermions may have non-standard couplings at the leading order, and an arbitrary total B-L charge. In order to perform the anomaly-matching in that case, we generalize the construction of the Wess-Zumino effective lagrangian. Composite fermions beyond the three known generations are theoretically allowed, and there are no restrictions from the anomaly-matching on their couplings nor on their U(1)_{B-L} charge. Absence of global anomalies for the composite sector as a whole does not preclude anomalous triple gauge boson couplings arising from composite fermion triangular diagrams. On the other hand, the trace of B-L over elementary fermions must vanish if all Goldstone modes are to disappear from the spectrum.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-10-20T14:52:32.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "effective theory",
      "higgs-less effective theories",
      "gauge boson couplings arising",
      "anomaly-matching",
      "anomalous triple gauge boson couplings"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "IOP",
      "journal": "Journal of High Energy Physics",
      "year": 2004,
      "month": "Sep",
      "volume": 2004,
      "number": 9,
      "pages": "058"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 33,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 645412,
      "adsabs": "2004JHEP...09..058H"
    }
  }
}