{
  "id": "2012.01804",
  "version": "v1",
  "published": "2020-12-03T10:10:40.000Z",
  "updated": "2020-12-03T10:10:40.000Z",
  "title": "The resonances $X(4140)$, $X(4160)$, and $P_{cs}(4459)$ in the decay of $Λ_b\\to J/ψΛφ$",
  "authors": [
    "Wen-Ying Liu",
    "Wei Hao",
    "Guan-Ying Wang",
    "Yan-Yan Wang",
    "En Wang",
    "De-Min Li"
  ],
  "comment": "8 pages, 10 figures",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We study the decay of $\\Lambda_b\\to J/\\psi\\Lambda\\phi$ by taking into account the intermediate resonances $X(4140)$, $X(4160)$, and $P_{cs}(4459)$. In addition to the peak of the $X(4140)$, we also find a bump structure around 4160 MeV followed by a cusp structure around $D^*_s\\bar{D}^*_s$ threshold in the $J/\\psi\\phi$ invariant mass distribution of the $\\Lambda_b\\to J/\\psi\\Lambda\\phi$ process, which can be associated to the $D^*_s\\bar{D}^*_s$ molecular state $X(4160)$. We also show that this reaction can also be used to confirm the existence of the hidden-charm pentaquark $P_{cs}(4459)$ with strangeness. We predict an enhancement structure close to the threshold in the $D^*_s\\bar{D}^*_s$ invariant mass distribution of the $\\Lambda_b\\to D^*_s\\bar{D}^*_s\\Lambda$ process, which is the reflection of the $X(4160)$ and should not be misidentified with a new resonance. We strongly suggest experimentalists to further measure these processes, which can be useful to clarify the nature of $X(4140)$ and $X(4160)$ resonances, and to confirm the existence of the $P_{cs}(4459)$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-12-03T10:10:40.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "invariant mass distribution",
      "enhancement structure close",
      "intermediate resonances",
      "cusp structure",
      "molecular state"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}