1 Ocak 2020 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/105441</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Evidence Of Rescattering Effect In Pb–Pb Collisions At The Lhc Through Production Of K And (1020) Mesons</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2020</publicationYear>
  <dates>
    <date dateType="Issued">2020-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/105441</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.physletb.2020.135225</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;Measurements of K${}^{⁎}\left(892\right)^{0}$ and $\varphi \left(1020\right)$ resonance production in Pb–Pb and pp collisions at $\sqrt{{s}_{\mathrm{NN}}}$ = 5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity ($|y|$ &amp;lt; 0.5) via their hadronic decay channels and the transverse momentum (${p}_{T}$) distributions are obtained for various collision centrality classes up to ${p}_{T}$ = 20 GeV/c. The ${p}_{T}$-integrated yield ratio K${}^{⁎}\left(892\right)^{0}$/K in Pb–Pb collisions shows significant suppression relative to pp collisions and decreases towards more central collisions. In contrast, the $\varphi \left(1020\right)$/K ratio does not show any suppression. Furthermore, the measured K${}^{⁎}\left(892\right)^{0}$/K ratio in central Pb–Pb collisions is significantly suppressed with respect to the expectations based on a thermal model calculation, while the $\varphi \left(1020\right)$/K ratio agrees with the model prediction. These measurements are an experimental demonstration of rescattering of K${}^{⁎}\left(892\right)^{0}$ decay products in the hadronic phase of the collisions. The K${}^{⁎}\left(892\right)^{0}$/K yield ratios in Pb–Pb and pp collisions are used to estimate the time duration between chemical and kinetic freeze-out, which is found to be ∼ 4–7 fm/c for central collisions. The ${p}_{T}$-differential ratios of K${}^{⁎}\left(892\right)^{0}$/K, $\varphi \left(1020\right)$/K, K${}^{⁎}\left(892\right)^{0}$/π, $\varphi \left(1020\right)$/π, p/K${}^{⁎}\left(892\right)^{0}$ and p/$\varphi \left(1020\right)$ are also presented for Pb–Pb and pp collisions at $\sqrt{{s}_{\mathrm{NN}}}$ = 5.02 TeV. These ratios show that the rescattering effect is predominantly a low-${p}_{T}$ phenomenon.&lt;/p&gt;</description>
  </descriptions>
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