{
  "id": "2205.12188",
  "version": "v1",
  "published": "2022-05-24T16:42:59.000Z",
  "updated": "2022-05-24T16:42:59.000Z",
  "title": "Gamma/Hadron Separation with the HAWC Observatory",
  "authors": [
    "R. Alfaro",
    "C. Alvarez",
    "J. D. Álvarez",
    "J. R. Angeles Camacho",
    "J. C. Arteaga-Velázquez",
    "D. Avila Rojas",
    "H. A. Ayala Solares",
    "R. Babu",
    "E. Belmont-Moreno",
    "C. Brisbois",
    "K. S. Caballero-Mora",
    "T. Capistrán",
    "A. Carramiñana",
    "S. Casanova",
    "O. Chaparro-Amaro",
    "U. Cotti",
    "J. Cotzomi",
    "S. Coutiño de León",
    "E. De la Fuente",
    "C. de León",
    "R. Diaz Hernandez",
    "B. L. Dingus",
    "M. A. DuVernois",
    "M. Durocher",
    "J. C. Díaz-Vélez",
    "R. W. Ellsworth",
    "K. Engel",
    "C. Espinoza",
    "K. L. Fan",
    "M. Fernández Alonso",
    "N. Fraija",
    "D. Garcia",
    "J. A. García-González",
    "F. Garfias",
    "M. M. González",
    "J. A. Goodman",
    "J. P. Harding",
    "S. Hernandez",
    "B. Hona",
    "D. Huang",
    "F. Hueyotl-Zahuantitla",
    "P. Hüntemeyer",
    "A. Iriarte",
    "A. Jardin-Blicq",
    "V. Joshi",
    "S. Kaufmann",
    "G. J. Kundem A. Lara",
    "W. H. Lee",
    "J. Lee",
    "H. León Vargas",
    "J. T. Linnemann",
    "G. Luis-Raya",
    "J. Lundeen",
    "K. Malone",
    "V. Marandon",
    "O. Martinez",
    "J. Martínez-Castro",
    "J. A. Matthews",
    "P. Miranda-Romagnoli",
    "J. A. Morales-Soto",
    "A. Nayerhoda",
    "L. Nellen",
    "M. U. Nisa",
    "R. Noriega-Papaqui",
    "L. Olivera-Nieto",
    "N. Omodei",
    "A. Peisker",
    "Y. Pérez Araujo",
    "E. G. Pérez-Pérez",
    "C. D. Rho",
    "D. Rosa-González",
    "E. Ruiz-Velasco",
    "H. Salazar",
    "F. Salesa Greus",
    "A. Sandoval",
    "P. M. Saz Parkinson",
    "J. Serna-Franco",
    "A. J. Smith",
    "R. W. Springer",
    "O. Tibolla",
    "K. Tollefson",
    "I. Torres",
    "R. Torres-Escobedo",
    "R. Turner",
    "F. Ureña-Mena",
    "L. Villaseñor",
    "X. Wang",
    "I. J. Watson",
    "F. Werner",
    "E. Willox",
    "J. Wood",
    "A. Zepeda",
    "H. Zhou"
  ],
  "comment": "35 pages, 9 figures, published in Nuclear Instruments and Methods in Physics Research Section A",
  "categories": [
    "astro-ph.HE",
    "astro-ph.IM",
    "hep-ex",
    "physics.ins-det"
  ],
  "abstract": "The High Altitude Water Cherenkov (HAWC) gamma-ray observatory observes atmospheric showers produced by incident gamma rays and cosmic rays with energy from 300 GeV to more than 100 TeV. A crucial phase in analyzing gamma-ray sources using ground-based gamma-ray detectors like HAWC is to identify the showers produced by gamma rays or hadrons. The HAWC observatory records roughly 25,000 events per second, with hadrons representing the vast majority ($>99.9\\%$) of these events. The standard gamma/hadron separation technique in HAWC uses a simple rectangular cut involving only two parameters. This work describes the implementation of more sophisticated gamma/hadron separation techniques, via machine learning methods (boosted decision trees and neural networks), and summarizes the resulting improvements in gamma/hadron separation obtained in HAWC.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-05-24T16:42:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high altitude water cherenkov",
      "standard gamma/hadron separation technique",
      "hawc observatory records",
      "simple rectangular cut",
      "sophisticated gamma/hadron separation techniques"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 35,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}