{
  "id": "1804.11041",
  "version": "v1",
  "published": "2018-04-30T04:06:04.000Z",
  "updated": "2018-04-30T04:06:04.000Z",
  "title": "Z+jet correlation with NLO-matched parton-shower and jet-medium interaction in high-energy nuclear collisions",
  "authors": [
    "Shan-Liang Zhang",
    "Tan Luo",
    "Xin-Nian Wang",
    "Ben-Wei Zhang"
  ],
  "comment": "5 pages, 5 figures",
  "categories": [
    "nucl-th",
    "hep-ph",
    "nucl-ex"
  ],
  "abstract": "The impact of jet quenching on $Z^0$-tagged jets in relativistic heavy-ion collisions at the Large Hadron Collider (LHC) is investigated. We employ Sharpa Monte Carlo program that combines next-to-leading order matrix elements with matched resummation of parton shower to compute the initial $Z^0$+jet production. The Linear Boltzmann Transport (LBT) model is then used to simulate the propagation, energy attenuation of and medium response induced by jet partons in the quark-gluon plasma. With both higher-order corrections and matched soft/collinear radiation as well as a sophisticated treatment of parton energy loss and medium response in LBT, our numerical calculations can provide the best description so far of all available observables of $Z^0$+jet simultaneously in both p+p and Pb+Pb collisions, in particular, the shift of the distribution in transverse momentum asymmetry $x_{\\rm jZ}=p_T^{\\rm jet}/p_T^Z$, the modification of azimuthal angle correlation in $\\Delta\\phi_{\\rm{j}Z}=|\\phi_{\\rm jet}-\\phi_Z|$ and the overall suppression of average number of $Z^0$-tagged jets per boson $R_{\\rm jZ}$ at $\\sqrt s =5.02$ TeV as measured by the CMS experiment. We also show that higher-order corrections to $Z^0$+jet production play an indispensable role in understanding $Z^0$+jet azimuthal angle correlation at small and intermediate $\\Delta\\phi_{\\rm jZ}$, and momentum imbalance at small $x_{\\rm jZ}$. Jet quenching of the sub-leading jets is shown to lead to suppression of $Z^0$+jet correlation at small azimuthal angle difference $\\Delta\\phi_{\\rm jZ}$ and at small $x_{\\rm jZ}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-04-30T04:06:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high-energy nuclear collisions",
      "jet-medium interaction",
      "nlo-matched parton-shower",
      "employ sharpa monte carlo program",
      "jet azimuthal angle correlation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}