{
  "id": "1509.05359",
  "version": "v1",
  "published": "2015-09-17T18:29:23.000Z",
  "updated": "2015-09-17T18:29:23.000Z",
  "title": "Bottomonium production in heavy-ion collisions at STAR",
  "authors": [
    "Robert Vertesi",
    "for the STAR Collaboration"
  ],
  "comment": "Proceedings of the Hard Probes International Conference 2015, Montreal, Canada. To be published in the Nuclear and Particle Physics Proceedings. 4 pages, 5 figures",
  "categories": [
    "hep-ex",
    "nucl-ex"
  ],
  "abstract": "Bottomonium measurements provide unique insight into hot and cold nuclear matter effects present in the medium that is formed in high-energy heavy-ion collisions. Recent STAR results show that in $\\sqrt{s_{NN}}$ = 200 GeV central Au+Au collisions the $\\Upsilon$(1S) state is suppressed more than if only cold nuclear matter effects were present, and the excited state yields are consistent with a complete suppression. In 2012, STAR also collected 263.4 $\\mu$b$^{-1}$ high-energy-electron triggered data in U+U collisions at $\\sqrt{s_{NN}}$= 193 GeV. Central U+U collisions, with an estimated 20% higher energy density than in central Au+Au data, extend the $\\Upsilon$(1S+2S+3S) and Upsilon(1S) nuclear modification trends observed in Au+Au towards higher number of participant nucleons, and confirm the suppression of the $\\Upsilon$(1S) state. We see a hint with 1.8 sigma significance that the $\\Upsilon$(2S+3S) excited states are not completely suppressed in U+U collisions. These data support the sequential in-medium quarkonium dissociation picture and favor models with a strong $q\\bar{q}$ binding.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-09-17T18:29:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "heavy-ion collisions",
      "bottomonium production",
      "cold nuclear matter effects",
      "sequential in-medium quarkonium dissociation picture",
      "nuclear modification trends"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015arXiv150905359V",
      "inspire": 1393761
    }
  }
}