{
  "id": "hep-ex/0612059",
  "version": "v1",
  "published": "2006-12-22T21:29:18.000Z",
  "updated": "2006-12-22T21:29:18.000Z",
  "title": "Beam-Spin Asymmetries in the Azimuthal Distribution of Pion Electroproduction",
  "authors": [
    "HERMES Collaboration",
    "A. Airapetian"
  ],
  "journal": "Phys.Lett.B648:164-170,2007",
  "doi": "10.1016/j.physletb.2007.03.015",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the {HERMES} spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle $\\phi$ of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for $\\pi^+,\\pi^-$ and $\\pi^0$ mesons. The dependence of this amplitude on the Bjorken scaling variable and on the pion fractional energy and transverse momentum is presented. The results are compared to theoretical model calculations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-12-22T21:29:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.88.+e",
      "13.60.-r",
      "14.20.Dh",
      "24.85.+p",
      "13.87.Fh"
    ],
    "keywords": [
      "beam-spin asymmetry",
      "azimuthal distribution",
      "pion electroproduction",
      "pion fractional energy",
      "gev positron beam"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 735612
    }
  }
}