1 Ocak 2016 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 107827, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2016-01-01", 
  "description": "<p>The multi-strange baryon yields in Pb Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, \u039e and \u03a9 production rates have been measured with the ALICE experiment as a function of transverse momentum, pT , in p Pb collisions at a centre-of-mass energy of sNN=5.02\u00a0TeV . The results cover the kinematic ranges 0.6\u00a0GeV/c&lt;pT&lt;7.2\u00a0GeV/c and 0.8\u00a0GeV/c&lt;pT&lt;5\u00a0GeV/c , for \u039e and \u03a9 respectively, in the common rapidity interval \u22120.5&lt;yCMS&lt;0 . Multi-strange baryons have been identified by reconstructing their weak decays into charged particles. The pT spectra are analysed as a function of event charged-particle multiplicity, which in p Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb Pb collisions. The measured pT distributions are compared to the expectations from a Blast-Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon.</p>", 
  "headline": "Multi-strange baryon production in p Pb collisions at sNN=5.02\u00c2 TeV", 
  "identifier": 107827, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Multi-strange baryon production in p Pb collisions at sNN=5.02\u00c2 TeV", 
  "url": "https://aperta.ulakbim.gov.tr/record/107827"
}