1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1016/j.physletb.2023.138154", 
  "abstract": "<p>Parton energy loss in the quark\u2013gluon plasma (QGP) is studied with a measurement of photon-tagged jet production in 1.7 nb$^{\u22121}$ of Pb+Pb data and 260 pb$^{\u22121}$ of pp data, both at $\\sqrt{{s}_{\\mathrm{NN}}}=5.02$ TeV, with the ATLAS detector. The process pp \u2192\u03b3+jet+X and its analogue in Pb+Pb collisions is measured in events containing an isolated photon with transverse momentum (${p}_{T}$) above 50 GeV and reported as a function of jet ${p}_{T}$. This selection results in a sample of jets with a steeply falling ${p}_{T}$ distribution that are mostly initiated by the showering of quarks. The pp and Pb+Pb measurements are used to report the nuclear modification factor, ${R}_{\\mathrm{AA}}$, and the fractional energy loss, ${S}_{\\mathrm{loss}}$, for photon-tagged jets. In addition, the results are compared with the analogous ones for inclusive jets, which have a significantly smaller quark-initiated fraction. The ${R}_{\\mathrm{AA}}$ and ${S}_{\\mathrm{loss}}$ values are found to be significantly different between those for photon-tagged jets and inclusive jets, demonstrating that energy loss in the QGP is sensitive to the colour-charge of the initiating parton. The results are also compared with a variety of theoretical models of colour-charge-dependent energy loss.</p>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physics Letters B", 
  "id": "264432", 
  "issued": {
    "date-parts": [
      [
        2023, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Comparison of inclusive and photon-tagged jet suppression in 5.02 TeV Pb+Pb collisions with ATLAS", 
  "type": "article-journal", 
  "volume": "846 C"
}