1 Ocak 2020 Dergi makalesi Açık Erişim

CERN İşbirliği

Dublin Core

<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2020-01-01</dc:date>
  <dc:description>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 ($|y|$ &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.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/105441</dc:identifier>
  <dc:identifier>oai:zenodo.org:105441</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physics Letters B 802 C</dc:source>
  <dc:title>Evidence of rescattering effect in Pb–Pb collisions at the LHC through production of K And (1020) Mesons</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>