1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/264718</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Investigating The Role Of Strangeness In Baryon–Antibaryon Annihilation At The Lhc</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2023</publicationYear>
  <dates>
    <date dateType="Issued">2023-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/264718</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.physletb.2022.137060</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;Annihilation dynamics plays a fundamental role in the baryon–antibaryon interaction ($\mathrm{B–}\stackrel{‾}{B}$) at low-energy and its strength and range are crucial in the assessment of possible baryonic bound states. Experimental data on annihilation cross sections are available for the $\mathrm{p–}\stackrel{‾}{p}$ system but not in the low relative momentum region. Data regarding the $\mathrm{B–}\stackrel{‾}{B}$ interaction with strange degrees of freedom are extremely scarce, hence the modeling of the annihilation contributions is mainly based on nucleon–antinucleon ($\mathrm{N–}\stackrel{‾}{N}$) results, when available. In this letter we present a measurement of the $\mathrm{p–}\stackrel{‾}{p}$, $\mathrm{p–}\stackrel{‾}{\Lambda }\oplus \stackrel{‾}{p}\text{–}\Lambda $ and $\Lambda \text{–}\stackrel{‾}{\Lambda }$ interaction using correlation functions in the relative momentum space in high-multiplicity triggered pp collisions at $\sqrt{s}\phantom{\rule{0.25em}{0ex}}=\phantom{\rule{0.25em}{0ex}}13$ TeV recorded by ALICE at the LHC. In the $\mathrm{p–}\stackrel{‾}{p}$ system the couplings to the mesonic channels in different partial waves are extracted by adopting a coupled-channel approach with recent χEFT potentials. The inclusion of these inelastic channels provides good agreement with the data, showing a significant presence of the annihilation term down to zero momentum. Predictions obtained using the Lednický–Lyuboshits formula and scattering parameters obtained from heavy-ion collisions, hence mainly sensitive to elastic processes, are compared with the experimental $\mathrm{p–}\stackrel{‾}{\Lambda }\oplus \stackrel{‾}{p}\text{–}\Lambda $ and $\Lambda \text{–}\stackrel{‾}{\Lambda }$ correlations. The model describes the $\Lambda \text{–}\stackrel{‾}{\Lambda }$ data and underestimates the $\mathrm{p–}\stackrel{‾}{\Lambda }\oplus \stackrel{‾}{p}\text{–}\Lambda $ data in the region of momenta below 200 MeV/c. The observed deviation indicates a different contribution of annihilation channels to the two systems containing strange hadrons.&lt;/p&gt;</description>
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