1 Ocak 2019 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>2019-01-01</dc:date>
  <dc:description>In this letter, the production of deuterons and anti-deuterons in pp collisions at $\sqrt{s}=7$ TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (${p}_{T}$). The measurements are discussed in the context of hadron–coalescence models. The coalescence parameter ${B}_{2}$, extracted from the measured spectra of (anti-)deuterons and primary (anti-)protons, exhibits no significant ${p}_{T}$-dependence for ${p}_{T}&lt;3$ $\text{GeV}\phantom{\rule{-0.05em}{0ex}}/\phantom{\rule{-0.02em}{0ex}}c$, in agreement with the expectations of a simple coalescence picture. At fixed transverse momentum per nucleon, the ${B}_{2}$ parameter is found to decrease smoothly from low multiplicity pp to Pb–Pb collisions, in qualitative agreement with more elaborate coalescence models. The measured mean transverse momentum of (anti-)deuterons in pp is not reproduced by the Blast-Wave model calculations that simultaneously describe pion, kaon and proton spectra, in contrast to central Pb–Pb collisions. The ratio between the ${p}_{T}$-integrated yield of deuterons to protons, d/p, is found to increase with the charged-particle multiplicity, as observed in inelastic pp collisions at different centre-of-mass energies. The d/p ratios are reported in a wide range, from the lowest to the highest multiplicity values measured in pp collisions at the LHC.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/105899</dc:identifier>
  <dc:identifier>oai:zenodo.org:105899</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 794 C</dc:source>
  <dc:title>Multiplicity dependence of (anti-)deuteron production in pp collisions at</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>