{
  "id": "1603.08802",
  "version": "v1",
  "published": "2016-03-29T15:10:26.000Z",
  "updated": "2016-03-29T15:10:26.000Z",
  "title": "750 GeV Diphoton Excess as a Composite (Pseudo)scalar Boson from New Strong Interaction",
  "authors": [
    "P. Ko",
    "Chaehyun Yu",
    "Tzu-Chiang Yuan"
  ],
  "comment": "6 pages, 3 figures",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "The diphoton excess at 750 GeV would make a definite signal of new physics beyond the Standard Model, if it is confirmed. In this letter, we consider a possibility that the excess is due to a composite (pseudo)scalar boson, whose constituents are either new vector-like quarks (Q\\overline{Q}) or scalar quarks (\\widetilde{Q} \\widetilde{Q}^\\dagger) which feel new QCD-like vectorlike confining force with confinement scale Lambda_h. Assuming m_Q (m_{\\widetilde Q}) >> Lambda_h, the observed 750 GeV excess could be either Q\\overline{Q} (^1S_0) state with J^{PC} = 0^{-+} or \\widetilde{Q} \\widetilde{Q}^\\dagger (^1S_0) state with J^{PC}=0^{++}. For the Q\\bar{Q} scenario, there will be a spin-triplet partner psi_Q which is slightly heavier that eta_Q because of the hyper fine interactions mediated by h-gluon exchange. We consider productions and decays of eta_Q, eta_{\\widetilde Q} and psi_Q using the nonrelativistic QCD methods, and identify the parameter regions which can explain the observed diphoton excess. We discuss how to test these scenarios using the Drell-Yan process for psi_Q case, and the dijet azimuthal angular distributions to determine the J^{PC} quantum number of the diphoton excess.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-03-29T15:10:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gev diphoton excess",
      "scalar boson",
      "strong interaction",
      "dijet azimuthal angular distributions",
      "nonrelativistic qcd methods"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016arXiv160308802K",
      "inspire": 1436363
    }
  }
}