30 Eylül 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/274677</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Observation Of Enhanced Long-Range Elliptic Anisotropies Inside High-Multiplicity Jets In $Pp$ Collisions At $\Sqrt{S}=13\Text{}\Text{}\Mathrm{Tev}$</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2024</publicationYear>
  <dates>
    <date dateType="Issued">2024-09-30</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/274677</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1103/PhysRevLett.133.142301</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;A search for collective effects inside jets produced in proton-proton collisions is performed via correlation measurements of charged particles using the CMS detector at the CERN LHC. The analysis uses data collected at a center-of-mass energy of $\sqrt{s}=13\text{}\text{}\mathrm{TeV}$, corresponding to an integrated luminosity of $138\text{}\text{}{\mathrm{fb}}^{-1}$. Jets are reconstructed with the anti-${k}_{T}$ algorithm with a distance parameter of 0.8 and are required to have transverse momentum greater than 550 GeV and pseudorapidity $|{\eta }^{\text{jet}}|&amp;lt;1.6$. Two-particle correlations among the charged particles within the jets are studied as functions of the particles' azimuthal angle and pseudorapidity separations ($\Delta {\varphi }^{*}$ and $\Delta {\eta }^{*}$) in a jet coordinate basis, where particles' ${\eta }^{*}$, ${\varphi }^{*}$ are defined relative to the direction of the jet. The correlation functions are studied in classes of in-jet charged-particle multiplicity up to ${N}_{\mathrm{ch}}^{j}\approx 100$. Fourier harmonics are extracted from long-range azimuthal correlation functions to characterize azimuthal anisotropy for $|\Delta {\eta }^{*}|&amp;gt;2$. For low-${N}_{\mathrm{ch}}^{j}$ jets, the long-range elliptic anisotropic harmonic, ${v}_{2}^{*}$, is observed to decrease with ${N}_{\mathrm{ch}}^{j}$. This trend is well described by Monte Carlo event generators. However, a rising trend for ${v}_{2}^{*}$ emerges at ${N}_{\mathrm{ch}}^{j}\gtrsim 80$, hinting at a possible onset of collective behavior, which is not reproduced by the models tested. This observation yields new insights into the dynamics of jet evolution in the vacuum.&lt;/p&gt;</description>
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