{
  "id": "1810.10056",
  "version": "v1",
  "published": "2018-10-23T19:07:52.000Z",
  "updated": "2018-10-23T19:07:52.000Z",
  "title": "Search for rare decays of Z and Higgs bosons to J$/ψ$ and a photon in proton-proton collisions at $\\sqrt{s}=$ 13 TeV",
  "authors": [
    "CMS Collaboration"
  ],
  "comment": "Submitted to Eur. Phys. J. C. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-17-012 (CMS Public Pages)",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A search is presented for decays of Z and Higgs bosons to a J$/\\psi$ meson and a photon, with the subsequent decay of the J$/\\psi$ to $\\mu^+\\mu^-$. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9 fb$^{-1}$ at $\\sqrt{s}=$ 13 TeV collected with the CMS detector at the LHC. The observed limit on the Z$\\to$J$/\\psi \\gamma$ decay branching fraction, assuming that the J$/\\psi$ meson is produced unpolarized, is 1.4$\\times$10$^{-6}$ at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from -13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H$\\to$J$/\\psi \\gamma$ where the J$/\\psi$ meson is assumed to be transversely polarized is 7.6$\\times$10$^{-4}$, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at $\\sqrt{s}=$ 8 TeV to produce an observed upper limit on the branching fraction for H$\\to$J$/\\psi \\gamma$ that is a factor of 220 larger than the standard model value.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-10-23T19:07:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "proton-proton collisions",
      "higgs boson",
      "rare decays",
      "branching fraction",
      "upper limit"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}