1 Ocak 2018 Dergi makalesi Açık Erişim

CERN İşbirliği

JSON-LD (schema.org)

{
  "@context": "https://schema.org/", 
  "@id": 106557, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2018-01-01", 
  "description": "<p>Neutral pion and   $\\eta $  meson invariant differential yields were measured in non-single diffractive p\u2013Pb collisions at   $\\sqrt{{s}_{\\mathrm{NN}}}$  = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of   ${\\pi }^{0}$  and   $\\eta $  meson inclusive production are measured near mid-rapidity in a broad transverse momentum range of   $0.3&lt;{p}_{T}&lt;20\\phantom{\\rule{0.333333em}{0ex}}\\text{GeV}/c$  and   $0.7&lt;{p}_{T}&lt;20\\phantom{\\rule{0.333333em}{0ex}}\\text{GeV}/c$ , respectively. The measured   $\\eta /{\\pi }^{0}$  ratio increases with   ${p}_{T}$  and saturates for   ${p}_{T}$  &gt; 4   $\\text{GeV}/c$  at   $0.483\u00b10.{015}_{\\mathrm{stat}}\u00b10.{015}_{\\mathrm{sys}}$ . A deviation from   ${m}_{T}$  scaling is observed for   ${p}_{T}&lt;$  2   $\\text{GeV}/c$ . The measured   $\\eta /{\\pi }^{0}$  ratio is consistent with previous measurements from proton-nucleus and pp collisions over the full   ${p}_{T}$  range. The measured   $\\eta /{\\pi }^{0}$  ratio at high   ${p}_{T}$  also agrees within uncertainties with measurements from nucleus\u2013nucleus collisions. The   ${\\pi }^{0}$  and   $\\eta $  yields in p\u2013Pb relative to the scaled pp interpolated reference,   ${R}_{\\mathrm{pPb}}$ , are presented for   $0.3&lt;{p}_{T}&lt;$  20   $\\text{GeV}/c$  and   $0.7&lt;{p}_{T}&lt;$  20   $\\text{GeV}/c$ , respectively. The results are compared with theoretical model calculations. The values of   ${R}_{\\mathrm{pPb}}$  are consistent with unity for transverse momenta above 2   $\\text{GeV}/c$ . These results support the interpretation that the suppressed yield of neutral mesons measured in Pb\u2013Pb collisions at LHC energies is due to parton energy loss in the hot QCD medium.</p>", 
  "headline": "Neutral pion and   $\\eta $  meson production in p\u2013Pb collisions at   $\\sqrt{{s}_{\\mathrm{NN}}}$  = 5.02 TeV", 
  "identifier": 106557, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Neutral pion and   $\\eta $  meson production in p\u2013Pb collisions at   $\\sqrt{{s}_{\\mathrm{NN}}}$  = 5.02 TeV", 
  "url": "https://aperta.ulakbim.gov.tr/record/106557"
}