{
  "id": "1205.4527",
  "version": "v1",
  "published": "2012-05-21T09:08:13.000Z",
  "updated": "2012-05-21T09:08:13.000Z",
  "title": "Observation of Diffractively Produced W Bosons in pp Collisions in the CMS Experiment",
  "authors": [
    "Jürg Eugster"
  ],
  "comment": "Proceedings for Moriond 2012, Electroweak Session, Young Scientist Forum, 4 pages, 2 Figures",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A study of forward energy flow in leptonically decaying W bosons using data of an integrated luminosity corresponding to 36 pb-1 of pp collisions at a center-of-mass energy of 7 TeV is presented. This data was recorded with the CMS detector during the 2010 running of the LHC. In this sample of W events, about 300 events with no significant energy deposits in one of the forward calorimeters are observed. This corresponds to a large pseudorapidity gap of at least 1.9 units. The majority of the charged leptons from these W decays are found in the hemisphere opposite to the gap. This gives a strong indication of a diffractive component in the W production, which can be explained in terms of diffractive parton distribution functions (PDF) which have, on average, a smaller x than the conventional parton PDFs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-05-21T09:08:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pp collisions",
      "cms experiment",
      "observation",
      "conventional parton pdfs"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1115478,
      "adsabs": "2012arXiv1205.4527E"
    }
  }
}