{
  "id": "0807.2759",
  "version": "v2",
  "published": "2008-07-17T11:33:52.000Z",
  "updated": "2008-07-24T18:57:01.000Z",
  "title": "Resolving the Mass Hierarchy with Atmospheric Neutrinos using a Liquid Argon Detector",
  "authors": [
    "Raj Gandhi",
    "Pomita Ghoshal",
    "Srubabati Goswami",
    "S Uma Sankar"
  ],
  "comment": "13 pages, 3 figures, typing error in the abstract corrected, no other change",
  "journal": "Phys.Rev.D78:073001,2008",
  "doi": "10.1103/PhysRevD.78.073001",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We explore the potential offered by large-mass Liquid Argon detectors for determination of the sign of Delta m_{31}^2, or the neutrino mass hierarchy, through interactions of atmospheric neutrinos. We give results for a 100 kT sized magnetized detector which provides separate sensitivity to \\nu_\\mu, \\bar{\\nu}_\\mu and, over a limited energy range, to \\nu_e, \\bar{\\nu}_e.We also discuss the sensitivity for the unmagnetized version of such a detector. After including the effect of smearing in neutrino energy and direction and incorporating the relevant statistical,theoretical and systematic errors, we perform a binned \\chi^2 analysis of simulated data. The \\chi^2 is marginalized over the presently allowed ranges of neutrino parameters and determined as a function of \\theta_{13}. We find that such a detector offers superior capabilities for hierarchy resolution, allowing a > 4\\sigma determination for a 100 kT detector over a 10 year running period for values of \\sin^2 2\\theta_{13} \\ge 0.05. For an unmagnetized detector, a 2.5\\sigma hierarchy sensitivity is possible for \\sin^2 2\\theta_{13} = 0.04.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-07-24T18:57:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.60.Pq",
      "13.15.+g",
      "14.60.Lm",
      "29.40.Ka"
    ],
    "keywords": [
      "atmospheric neutrinos",
      "large-mass liquid argon detectors",
      "detector offers superior capabilities",
      "neutrino mass hierarchy",
      "sensitivity"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2008,
      "month": "Oct",
      "volume": 78,
      "number": 7,
      "pages": "073001"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 790967,
      "adsabs": "2008PhRvD..78g3001G"
    }
  }
}