{
  "id": "1108.3078",
  "version": "v1",
  "published": "2011-08-15T20:00:01.000Z",
  "updated": "2011-08-15T20:00:01.000Z",
  "title": "Exploring the S-Matrix of Massless Particles",
  "authors": [
    "Paolo Benincasa",
    "Eduardo Conde"
  ],
  "comment": "44 pages, 1 figure",
  "doi": "10.1103/PhysRevD.86.025007",
  "categories": [
    "hep-th",
    "hep-ph"
  ],
  "abstract": "We use the recently proposed generalised on-shell representation for scattering amplitudes and a consistency test to explore the space of tree-level consistent couplings in four-dimensional Minkowski spacetime. The extension of the constructible notion implied by the generalised on-shell representation, i.e. the possibility to reconstruct at tree level all the scattering amplitudes from the three-particle ones, together with the imposition of the consistency conditions at four-particle level, allow to rediscover all the known theories and their algebra structure, if any. Interestingly, this analysis seems to leave room for high-spin couplings, provided that at least the requirement of locality is weakened. We do not claim to have found tree-level consistent high-spin theories, but rather that our methods show signatures of them and very likely, with a suitable modification, they can be a good framework to perform a systematic search.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-08-15T20:00:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.15.Bt"
    ],
    "keywords": [
      "massless particles",
      "generalised on-shell representation",
      "tree-level consistent high-spin theories",
      "scattering amplitudes",
      "tree-level consistent couplings"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2012,
      "month": "Jul",
      "volume": 86,
      "number": 2,
      "pages": "025007"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 44,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 924210,
      "adsabs": "2012PhRvD..86b5007B"
    }
  }
}