{
  "id": "0902.1126",
  "version": "v1",
  "published": "2009-02-06T16:31:06.000Z",
  "updated": "2009-02-06T16:31:06.000Z",
  "title": "Study of a narrow pi+ pi- peak at about 755 MeV/c^2 in bar-p n --> 2 pi+ 3 pi- annihilation at rest",
  "authors": [
    "Mario Gaspero"
  ],
  "comment": "7 pages, 1 figure",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A narrow peak in the pi+ pi- mass distribution was seen by the Rome-Syracuse Collaboration in bar-p n --> 2 pi+ 3 pi- annihilation at rest 39 years ago. The reanalysis of this peak finds a mass of 757.4 +- 2.6 MeV/c^2 and a width slightly narrower than the experimental resolution. The evidence of the peak is 5.2 standard deviations. This state is generated in (12.4 +- 2.4)% of the bar-p n --> 2 pi+ 3 pi- annihilations at rest. No spin analysis is possible with the statistics of the experiment.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-02-06T16:31:06.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Le",
      "13.75.Cs",
      "14.40.Cs"
    ],
    "keywords": [
      "annihilation",
      "spin analysis",
      "rome-syracuse collaboration",
      "peak finds",
      "narrow peak"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 812768,
      "adsabs": "2009arXiv0902.1126G"
    }
  }
}