{
  "id": "2003.02441",
  "version": "v1",
  "published": "2020-03-05T05:47:14.000Z",
  "updated": "2020-03-05T05:47:14.000Z",
  "title": "$γ$-hadron spectra in p + Pb collisions at $\\sqrt{s_{\\rm NN}}=5.02$ TeV",
  "authors": [
    "Man Xie",
    "Xin-Nian Wang",
    "Han-Zhong Zhang"
  ],
  "categories": [
    "hep-ph",
    "nucl-th"
  ],
  "abstract": "Under the assumption that a quark-gluon plasma droplet is produced and its evolution can be described by hydrodynamics in p + A collisions, $\\gamma$-triggered hadron spectra are studied within a next-to-leading-order perturbative QCD parton model with the medium-modified parton fragmentation functions. The initial conditions and space-time evolution of the small QGP droplet are provided by the superSONIC hydrodynamic model simulations and parton energy loss in such a medium is described by the high-twist (HT) approach. The scaled jet transport coefficient $\\hat{q}/T^3$ in this HT approach is extracted from single hadron suppression in central A + A collisions at the same colliding energy. Numerical results for this scenario show that $\\gamma$-hadron spectra at $p_{\\rm T}^\\gamma=12-40$ GeV/$c$ are suppressed by 5\\% $\\sim$ 10\\% in the most central 0 - 10\\% p + Pb collisions at $\\sqrt{s_{\\rm NN}}=5.02$ TeV. The suppression becomes weaker at higher transverse momentum of the $\\gamma$ trigger. As a comparison, $\\gamma$-hadron suppression in Pb + Pb collisions at $\\sqrt{s_{\\rm NN}}=2.76$ and 5.02 TeV is also predicted.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-03-05T05:47:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pb collisions",
      "hadron spectra",
      "next-to-leading-order perturbative qcd parton model",
      "supersonic hydrodynamic model simulations",
      "medium-modified parton fragmentation functions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}