17 Ekim 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/274647</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Multiplicity Dependence Of Charged-Particle Intra-Jet Properties In Pp Collisions At     $\Sqrt{S}$   = 13 Tev</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2024</publicationYear>
  <dates>
    <date dateType="Issued">2024-10-17</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/274647</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1140/epjc/s10052-024-13228-0</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 first measurement of the multiplicity dependence of intra-jet properties of leading charged-particle jets in proton–proton (pp) collisions is reported. The mean charged-particle multiplicity and jet fragmentation distributions are measured in minimum-bias and high-multiplicity pp collisions at center-of-mass energy     $\sqrt{s}$   = 13 TeV using the ALICE detector. Jets are reconstructed from charged particles produced in the midrapidity region (    $|\eta |&amp;lt;0.9$  ) using the sequential recombination anti-    ${k}_{\text{T}}$   algorithm with jet resolution parameters R = 0.2, 0.3, and 0.4 for the transverse momentum (    ${p}_{\text{T}}$  ) interval 5–110 GeV/c. The high-multiplicity events are selected by the forward V0 scintillator detectors. The mean charged-particle multiplicity inside the leading jet cone rises monotonically with increasing jet     ${p}_{\text{T}}$   in qualitative agreement with previous measurements at lower energies. The distributions of jet fragmentation function variables     ${z}^{\text{ch}}$   and     ${\xi }^{\text{ch}}$   are measured for different jet-    ${p}_{\text{T}}$   intervals. Jet-    ${p}_{\text{T}}$   independent fragmentation of leading jets is observed for wider jets except at high- and low-    ${z}^{\text{ch}}$   values. The observed "hump-backed plateau" structure in the     ${\xi }^{\text{ch}}$   distribution indicates suppression of low-    ${p}_{\text{T}}$   particles. In high-multiplicity events, an enhancement of the fragmentation probability of low-    ${z}^{\text{ch}}$   particles accompanied by a suppression of high-    ${z}^{\text{ch}}$   particles is observed compared to minimum-bias events. This behavior becomes more prominent for low-    ${p}_{\text{T}}$   jets with larger jet radius. The results are compared with predictions of QCD-inspired event generators, PYTHIA 8 with Monash 2013 tune and EPOS LHC. It is found that PYTHIA 8 qualitatively reproduces the jet modification in high-multiplicity events except at high jet     ${p}_{\text{T}}$  . These measurements provide important constraints to models of jet fragmentation.&lt;/p&gt;</description>
  </descriptions>
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