1 Ocak 2016 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/107827</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Multi-Strange Baryon Production In P Pb Collisions At Snn=5.02Â Tev</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2016</publicationYear>
  <dates>
    <date dateType="Issued">2016-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/107827</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.physletb.2016.05.027</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;The multi-strange baryon yields in Pb Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, Ξ and Ω 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 TeV . The results cover the kinematic ranges 0.6 GeV/c&amp;lt;pT&amp;lt;7.2 GeV/c and 0.8 GeV/c&amp;lt;pT&amp;lt;5 GeV/c , for Ξ and Ω respectively, in the common rapidity interval −0.5&amp;lt;yCMS&amp;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.&lt;/p&gt;</description>
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