{
  "id": "1709.06783",
  "version": "v1",
  "published": "2017-09-20T09:31:14.000Z",
  "updated": "2017-09-20T09:31:14.000Z",
  "title": "A search for resonances decaying into a Higgs boson and a new particle $X$ in the $XH \\to qqbb$ final state with the ATLAS detector",
  "authors": [
    "ATLAS Collaboration"
  ],
  "comment": "36 pages in total, author list starting page 20, 7 figures, 0 tables, submitted to PLB, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2017-04/",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A search for heavy resonances decaying into a Higgs boson ($H$) and a new particle ($X$) is reported, utilizing 36.1 fb$^{-1}$ of proton--proton collision data at $\\sqrt{s} =$ 13 TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle $X$ is assumed to decay to a pair of light quarks, and the fully hadronic final state $XH \\rightarrow q\\bar q'b\\bar b$ is analysed. The search considers the regime of high $XH$ resonance masses, where the $X$ and $H$ bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of $XH$ mass versus $X$ mass is scanned for evidence of a signal, over a range of $XH$ resonance mass values between 1 TeV and 4 TeV, and for $X$ particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of $XH$ and $X$ masses, on the production cross-section of the $XH$ resonance.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-09-20T09:31:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "higgs boson",
      "atlas detector",
      "resonances decaying",
      "standard model processes",
      "resonance mass values"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 36,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}