{
  "id": "2306.02810",
  "version": "v1",
  "published": "2023-06-05T12:04:28.000Z",
  "updated": "2023-06-05T12:04:28.000Z",
  "title": "Novel approach to investigate $η$ decays via $η'\\rightarrowππη$",
  "authors": [
    "Xiaolin Kang",
    "Yuyao Ji",
    "Xiaoqing Yuan",
    "Benhou Xiang",
    "Xiaorong Zhou",
    "Haiping Peng",
    "Xingtao Huang",
    "Shuangshi Fang"
  ],
  "comment": "7 pages, 6 figures",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "To avoid the impact from the background events directly from $e^+e^-$ annihilations or $J/\\psi$ decays, we propose a novel approach to investigate $\\eta$ decays, in particular for its rare or forbidden decays, by using $\\eta^\\prime\\rightarrow\\pi\\pi\\eta$ produced in $J/\\psi$ decays at the $\\tau-$charm factories. Based on the MC studies of a few typical decays, $\\eta\\rightarrow \\pi\\pi$, $\\gamma l^+l^- (l= e, \\mu)$, $l^+l^-$, as well as $l^+l^-\\pi^0$, the sensitivities could be obviously improved by taking advantage of the extra constraint of $\\eta^\\prime$. Using one trillion $J/\\psi$ events accumulated at the Super $\\tau$-Charm facility, the precision on the investigation of $\\eta$ decays could be improved significantly and the observation of the rare decay $\\eta\\rightarrow e^+e^-$ is even accessable.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-06-05T12:04:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "novel approach",
      "mc studies",
      "background events",
      "forbidden decays",
      "charm factories"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}