{
  "id": "hep-ph/0509081",
  "version": "v2",
  "published": "2005-09-09T19:35:45.000Z",
  "updated": "2005-09-15T19:22:27.000Z",
  "title": "On the Possibility of a New Boson X^0 (214 MeV) in Sigma^+ -> p mu^+ mu^-",
  "authors": [
    "N. G. Deshpande",
    "G. Eilam",
    "J. Jiang"
  ],
  "comment": "6 pages; typos corrected, references added, 7 pages",
  "journal": "Phys.Lett. B632 (2006) 212-214",
  "doi": "10.1016/j.physletb.2005.10.050",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "We consider the existence of the state X^0 (214 MeV) in Sigma^+ -> p mu^+ mu^- decay found by the HyperCP collaboration. We assume that a fundamental spin zero boson X^0 coupled to quarks leads to flavor changing s -> d X^0 process. We estimate the scalar and pseudoscalar coupling constants by considering Sigma^+ -> p X^0 and K^+ -> pi^+ X^0 processes, and find that pseudoscalar coupling dominates. We then evaluate the branching ratios for K_L -> pi^0 pi^0 X^0, pi^+ pi^- X^0 and Omega^- -> Xi^- X^0 decays. All these rates are found to be in the measurable ranges. We also comment on X^0 coupling to muons and constraints from muon g-2.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2005-09-15T19:22:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "possibility",
      "fundamental spin zero boson",
      "hypercp collaboration",
      "pseudoscalar coupling dominates",
      "pseudoscalar coupling constants"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physics Letters B",
      "year": 2006,
      "month": "Jan",
      "volume": 632,
      "number": "2-3",
      "pages": 212
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 691729,
      "adsabs": "2006PhLB..632..212D"
    }
  }
}